I read his little black book. 

Actually, make that I tried to read it, but most of it was simply too comprehensive for my mind to grasp. However, there were some bits that I, even with my brain, actually understood. And there was only one reason why.

To my surprise, the book turned out to be his own personal notations and explanations of different areas within mathematics. Everything from simple calculus, analysis and geometry to applied mathematics, number theories and mathematical physics. There was a lot I didn't understand, but the parts I did understand... I only understood because he had rewritten the rules of how to learn them.

The loose notes that seemed to be crammed into the book at odd places held dates, formulas and examples of how he had managed to find alternative ways to make advanced math easier to understand. In other words, he had simplified hard math with sometimes just a single equation or piece of text so that it became easier to consume. I remember my eyes had widened as I'd read it and understood it, but not as much as when my eyes fell on the date to which he had made these discoveries.

High School Harry had been doing advanced mathematics ever since he was a teenager and simplifying it so even a moron like me could understand it. It was absolutely incredible.

It took me just about two hours to go through the little book, most of which time had been used to reread and try and remember his new, simpler rules. They applied to a lot of things, including things I hadn't learnt yet, but after reading this, it suddenly seemed like it wasn't going to be impossible for me to learn anymore.

Harry Devon had simplified the entire language of math and nobody knew. No wonder he was a fucking mathematical genius.

And why he was so notoriously private.

If anyone found these equations and learned how to apply them, the world of math and schools all around the world would basically have to reinvent their whole understanding of how math worked. To me, this was just a little black book, but to the world, this was revolutionary. Even someone as math-dumb as me could see this.

After a long shower, a face mask and a ten minute yoga stretch, I finally came out of my room, after spending the last few hours consuming all that he had written. The book, now firm in my hand, had to go back to its owner, whom not to anyone's surprise was to be found in his study, bent over a big book.

"Fuck Newton," I voiced, standing in the doorway to his office. I crossed my arms as Harry's head lifted and watched as his eyes landed on me. "That's basically what you're saying in this book, aren't you?"

I lifted the book and came in, shutting the door behind me as Harry leaned back and took off his glasses. He smiled calmly as I whacked the book down on his desk and took a seat on the edge.

"Did you understand anything?" He finally questioned.

"Did I? Why don't you tell me," I said, pursing my lips. He fucking knew I did. A monkey could've understood what he had written. It was absolutely incredible. It was like a secret math weapon that anyone could understand. "I know your ego is already sufficiently big, so I'm not going to sit here and tell you if I learnt anything, but if you're going to hand me a book like this, it better come with an offer."

"It does," Was his reply. He looked down at the book on his desk and slowly closed it. "I've decided to give you a chance to redeem yourself and earn your keep."

"Earn my keep?" I crossed my legs and narrowed my eyes. "Meaning...?"

"You've been staying here for weeks now, Ms Berry, and although to some people this is considered a vacation, I fully intended to start making you work for your place here in my house."

"Excuse me?" I raised a brow and slightly leaned back. "Are you saying you're gonna make me study as payment for staying here?"

"You wanted help; This is help."

I slowly pursed my lips again and uncrossed my arms. There was subtext to all of this, and I think I was reading it correctly.

He was going to tutor me, as a way of making up for the fact that I had been staying here rent free, but also to put truth behind my words about being a hard worker; I had said I wanted to be one of those people who could earn that scholarship, and now he was giving me the chance to prove that I could be. On my own, I knew I never would've stood a chance. But I wasn't on my own anymore...

"What changed your mind?" I slowly smirked and leaned forward when he folded his hands in his lap. "And don't say me. I couldn't have been that good last night."

"I haven't changed my mind, Ms Berry. I'm not going to tutor you."

"Then what—"

"—I'm going to give you the materials so you can tutor yourself. The right way."

I closed my mouth. Was he serious? I think he might be splitting hairs here, but in any case, it still sounded an awful lot like he was helping me. "Dang it. And here I thought I could sleep with my professor and earn better marks."

His lips twitched, but he then sat up. Slipping on his glasses, he stood up and grabbed his little black book and put it away on a shelf. "Learning math is not about looking at the same problem for ages and trying to figure out how to solve and understand it. It's about finding new ways to solve it, instead of relying on other people's logic to understand it."

"Your logic would make sense to a lot of people," I answered.

He smiled a little. "All that matters is whether or not it makes sense to you. If by the end of the summer you've proved to me that you're a hard worker who takes studying seriously, I'll make sure you receive your scholarship and get into the program you want."

"You can make all that happen?" I said impressed, and watched him walk around his study. "You know admissions are over, right? The only way I was getting that grant was because of your brother—"

"My brother doesn't own the grant, I do. He finances it to look philanthropic, but I was the one who set it up. If I call the board and vouch for you, you're in."

I breathed out, kind of winded. I hadn't seen that coming, but now actually thinking about it, it made more sense that he was the founder of the scholarship. "You'd really vouch for me? Put yourself on the line for me like that?"

If by any chance at all I somehow proved to him by the end of the summer that I was worth his vote, that meant he was putting his reputation and good judgment out on a limb here by speaking my case. If I failed to meet the promises he preached about me, not only would I take a hit, but so would Harry. Why would he risk his stamp of approval on a woman who once tried to trick him?

"Prove to me what you said last night is true, and I will, Ms Berry."

I cupped my mouth to hide my smile. I was so fucking ecstatic, but also nervous as hell. But in a good way.

I had never had to prove myself to someone that actually mattered – I had always said fuck society when it came to doing things as what was expected of me, which was probably why I had never amounted to much, but fuck that. What had society ever done for me?

My dad left before I had a chance to prove myself worthy of his love, and my mom had never really been capable of loving me the way a mother should've loved her child, but she did the best she could. Still, I had always been missing a vital link in my life, someone to look up to, someone to prove myself to, other than myself.

And now I was sitting across from Harry Devon; A world renowned mathematical genius who actually had credit to his name. Maybe it was my daddy issues talking, or maybe it was just plain simple logic, but getting his approval would mean something. To know a man like Harry Devon vouched for you... now that was something I wanted to work for.

"I would really like to suck your dick right now," I confessed, biting my bottom lip.

He chuckled dryly in response and looked at the floor. "I appreciate the candor, but I'd rather you put your head into your next assignment."

"Which is?"

He went up to a file cabinet next to one of his bookshelves and rummaged through it until he found a stack of papers folded into a half square. Once again, they were held together by a rubber band. "Read these and come to me when you're done."

When he held the papers out towards me, I got up from the table to grab them. "And if I stumble across something I don't understand?"

He smiled tightly at me as I leaned towards him. Then, cupping my chin, he met my eyes. "Read it again."

He let go and stepped away, walking back to his desk where he took a seat once more and resumed reading whatever he was reading before I entered. I smirked to myself, then looked down at the papers in my hand with a hopeful feeling. Why did this feel so better than when I accepted his brother's money?

– Because this was some honest fucking work and I was going to ace it.

~~~

Fuck that. Fuck everything. I took back my earlier statement as I glared at the papers he had handed me. They were in English, right? Or were my brain simply so fried by now that I couldn't read simple English anymore?

Sighing frustratedly, I threw the papers down on my bed and let myself fall back into my pillows. It was 4pm in the afternoon and I hadn't really done much else than study, other than grab a quick lunch. I was still trying to understand what he had given me, but these papers weren't like the last ones. These were meant to tackle my knowledge and help me expand my vision on how to attack a problem I couldn't figure out.

Find a new solution instead of relying on someone else's logic.

That was easier fucking said than done.

Pinching the bridge of my nose, I sat up once again and stretched my body until my limbs popped and cracked. I was stiff after hours of sitting bent over his papers. How the hell did he do it every day? Sit and do math all day without losing his ability to move without groaning?

My lips twitched a little as a sudden memory flashed through my mind. I could almost hear his grunts in my ear if I focused hard enough. The grunts he made as he came inside me and filled up the condom he had slipped on up in his bedroom. I remembered shivering and trembling beneath him, practically creaming myself at the sounds he made.

Damn it all, I was horny again. My prediction had been right, and as expected, by now I was starting to feel the abstinences of getting good dick. The thing about sex was, if your appetite was high, that was just one thing, but if the snack was right in front of you all damn day, teasing that appetite? That wasn't fair at all.

Sighing, I rubbed my temples and glanced down at the papers on my bed again. I needed a break. I couldn't focus any longer without getting distracted, so I decided right there and then I needed some air.

Jumping off my bed, I glanced out of the window and looked out at the sunny sky outside. For Canada, we were having a pretty decent summer this year. The weather had been mostly sunny with only a few cloudy days, and today was another sunny day. It had been a tough choice to choose studying over sunning outside, but reading in sharp light on white paper just wasn't easy on the eyes. Or at least it wasn't on my eyes. Committing meant a few sacrifices here and there, but that didn't mean I couldn't enjoy the sun on my breaks.

I was halfway down the stairs, already gunning for the turn at the bottom to head back towards the garden patio, when I suddenly heard a weird noise. I halted in the doorway and frowned when my ears detected the sound came from Harry's study.

Walking up to his door carefully, I realized the reason why I could hear weird sounds was because his door wasn't closed all the way. It stood ajar, just half an inch, and through that inch, my eyes were able to catch...

Oh, God. Why me and my pussy?

He was doing sit-ups on the floor. Fucking sit-ups. Shirtless, sweating and facing his giant blackboard, he was doing crunches on the floor while seemingly keeping his eyes focused on his work. Was he seriously working out whilst doing on his equation?

– Talk about a double workout.

"Wauw," I said, pushing the door open and coming inside. He didn't even halt mid-crunch, only kept breathing measured as he eased himself up and down. "You really don't understand the concept of relaxing, do you?"

"Good afternoon, Cassandra," He replied on an exhale when I closed the door behind me and came further in.

Smirking, I sat down on his desk and watched him complete his set. He worked for another full minute before he finally rested on the floor and grabbed a water bottle standing next to him.

"So you really workout whilst working?"

"Blood increases brain stimulation and heightens your concentration." He sipped his water, then glanced towards me. "Are you having trouble with the papers I gave you?"

"I am," I said, but then shrugged. "But I'm gonna look at them again a little later and see if I can't crack it. If not, I might need to use a lifeline."

"You don't get lifelines. You find the means to understand them yourself or you give up." He set the water bottle down and then lifted his hands to head again and started his crunches anew, as if we were merely discussing the weather.

Tutor or not, he was the hardest teacher I'd ever had.

Pursing my lips, I watched him for another moment, but then got up from the desk. I walked to the end of his feet and crouched down in front his bent knees, catching his eyes as he came up on his crunches. He stared back at me while continuing his steady movements.

"Has anyone ever told you you're ridiculously hot when you're being an ass?" I asked, listening to him push out labored breaths.

"You're in my way," He replied, but didn't take his eyes off of me. His equation was behind me and I was blocking it, and yet right now I don't think he was that focused on his problem.

Just as he came up, I wrapped my hand around his neck and pressed my lips against his, catching him with a hard kiss. He paused up and met my movements, angling his head to the side as I deepened the kiss.

Slipping my tongue past his lips, I moaned lightly as he kissed me back, meeting me thrust for thrust as our tongues battled. I wrapped both my hands around his neck and then moved forward, feeling him lean back and support his weight on his hand.

Swinging my legs astride his hips, I felt him lower his legs and allow me to take a seat on top of him. I brushed my fingers through his hair, but then tugged at it, before moving my hands down his chest, to his belt.

"What are you doing, Cassandra?" He calmly asked me as I unbuckled his belt and pants. I reached into his boxer shorts and felt for the bulge that was growing against his thigh.

"You have your ways of focusing," I breathed against his lips, "I have mine."

Pulling his cock free from his boxers, I stroked him slowly as our lips fused together again. His other hand came up and softly cupped my head while I worked my hand up and down his length.

I lowered my lips to his chest after a moment, when I no longer could resist his bared nipples and rock hard abs that were begging for my tongue as well. I teasingly bit into one of his nipples and felt as his hand ran through my hair, pushing it away from my face as I worked my way down. I caught his other nipple and let my teeth scrape across it before moving lower, pushing myself down to sit on his legs.

"I'd still really like to suck your dick," I said, kissing my way down his abs. I peaked up at him to see his ever calm and controlled face, his prominent jawline sticking out from the angle I was in.

He didn't reply, and I was pretty sure it was a rhetoric statement as well, because the next moment my lips reached his hips. His cock was still in my hand, but had grown heavy and beaded with pre-cūm since it came out of hiding. I looked up a last time to catch his face, searching for his permission, and with a slow nod, he gave it to me.

Lowering my eyes, I focused all my attention on his length as I opened my mouth and slid his tip against my tongue. Tasting the pre-cūm, I sucked it off before grasping his base firmly and sinking down.

I took him into my mouth, as much of his as I could, and didn't stop until his tip hit the back of my throat. He was large and my jaw clicked, but I regretted nothing as I felt his grasp on my hair firm up as I started bobbing.

Hollowing my cheeks out, I sucked and let my tongue slide against him as I took him to the back of my throat over and over again. I leaned back, sucked on his tip and caught his heated gaze, before dipping all the way down again and sucking.

For minutes, my mind blanked completely as I sucked his cock clean, feeling myself get wetter and wetter with every pulse I felt from having him in my mouth. Occasionally I heard him grunt quietly or hiss under his breath, but other than that, he let me have my fun. I had been dreaming about this, about what having him fucking my mouth would feel like, if he would taste sour or salty, and whether or not I could make him come.

The latter was still to be determined.

Gradually building up my pace, I moved up on down on his cock quicker and quicker until I could feel him jutting in my mouth. His breath grew harsher, coming out of his nostrils in hard exhales, but he still didn't crack. At this point my knees were hurting, but my resolve was as hard as his.

Suddenly, his hand grasped at the back of my head and pulled me up by my hair. I whimpered lightly, but didn't get a chance to protest. The next moment he had pulled my lips to his and had his mouth against mine, kissing me fervently.

I dug my fingers into his shoulders as I felt him pull me closer. I was dripping wet underneath my skirt, but it didn't appear like he was gonna bother investigating. So, taking the lead, I pushed my skirt up and let my thong-clad pussy rub against his throbbing cock that was resting against his stomach.

"I want you to fuck me again," I pleaded against his lips when his hand finally came to my ass and followed the movements my hips were making, rubbing against his cock. "Right here, right now. Fuck me hard."

"Is this how you study?" He replied when I moved my hands below my skirt and pushed my panty to the side. Letting my swollen lower lips rub along his length bare now, I shuddered as I felt the steel and the warmth of his cock. A solid promise of what was to come.

"If I say yes, will you do it again and again?" I breathed, grabbing his cock now and running his tip against my clit. I let out a quiet moan as I felt how warm he was and then moved up so his tip came to my wet entrance.

He met my eyes, just as I looked down, lost in the moment. My lips were slightly parted and my breath was short of being anything, but right then his eyes met mine and took the last from me.

And that's when he lowered me down on him.

Hands on my hips, I moaned out loud as he guided me down on his length and made me take him to the hilt. I felt my inner walls stretch around him and cling tightly to every vein running up his shaft. My pussy molded itself around him until he was fully sheathed inside me, buried to the hilt.

Pressing his lips against mine, Harry Devon let me ride his cock, after a short moment of adjusting, and allowed me to control the pace until we were both panting. With his hand tangled in my hair and my own hands clinging to his shoulders, I rode him right there on the floor of his study until I couldn't keep it together any longer. I came apart with a cry, but didn't slow my pace down as I felt him kiss my mouth throughout my climax.

Leaning against his hand, I felt as he began to swell inside me, just as my own climax faded. I kept riding him, keeping my lips pressed against his in fervor while his jaw tightened. I ran my fingers along his jawline and felt the muscles clench as he then with a last breath allowed himself to release inside me.

It shocked me slightly, but given that I was on birth control, I was fine with it, but after last night with him wearing a condom, I had thought maybe he didn't believe me – or maybe he just wanted to be sure. Either way, he was climaxing inside me now and I felt the warmth of him filling me up as he panted stealthily against my lips.

With a hard breath, we then both let ourselves collapse, Harry sinking onto his forearms and me collapsing on his chest. Still semi-erect inside me, I couldn't move a bone in my muscle yet. I was sweating like a pig, but so was he, so I wasn't too self-conscious about the fact that I probably looked like a hot mess. I felt his heart beat strongly against my palm as we both caught our breath and found the usage of our voices.

"Thank you," I breathed, swallowing when my voice sounded weird, but then exhaled tiredly. "I can go back to studying now."

I sensed his chest move and I realized he was chuckling silently. I smiled back involuntarily, unable to contain my own amusement. I hadn't actually come for this, but I guess this counted as a break as well.

"Don't let me keep you then," He replied, causing me to smile again when his voice sounded as messed up as mine.

With a last sigh, I then finally lifted myself up of his body, feeling his member slip out of me, just as I felt his climax shift inside me. My legs were sore from being on the hard wooden floor for too long, so with an awkward movement, I reached for his desk to steady myself.

Hearing Harry rise behind me, I then looked over my shoulder when I heard the sound of paper being snuffed from a dispenser. I saw him pull a few paper tissues out of a box of Kleenex on one of his shelves and then turn and hand them to me, which I took with a ginger smile. "Thanks."

Awkwardly cleaning up his mess, I shucked the papers into his trash can under his desk and then shifted my thong back into its place with a little wiggle. Then, straightening my skirt and fixing my hair blindly, I turned to see and hear Harry zipping up his fly and buckling up his belt. It all seemed redundant though since he would probably need a shower. Just like me.

"I guess I'll see you at dinner?" I said, not really knowing what to say. The situation felt awkward, but still... strangely comfortable. We were both adult people here... or at least he was. But he was treating me like an adult as well and I liked that.

"Happy studying," He announced, before walking past me with a little smile, going exactly for what I knew was his private bathroom. I smiled to myself and glanced after him over my shoulder, but then headed for the other exit myself, leading out into his hall.

Happy studying indeed.

• • •

Nothing like a bang to help you bang out the homework.