Sans's P.O.V

Sans awoke a few hours later. He rolled over to look at the digital clock on the side table that read 12:15. "Eh, Papy's probably worried. I better get the kid," he said to no-one in particular. He stood up, buttoned his jacket and laced up his shoes. He went back to the office but saw no-one there. He knew that the king probably made the kid rest just like he had made him. He went down to the bedrooms reserved for guests, opposed to the one he had been in which was reserved for members of the mafia.

He pushed open the door only to see a grotesque display unravel in front of him. A pile of dust and Asgores clothes were in the center of the room. Scrawled on the wall in blood, was a message for him. The bloody message read, "READY TO PLAY AGAIN SANS?"

Knowing what this meant, he ran out of the room and teleported back to his home. "Papyrus! Paps where are you?!" Sans rushed up the stairs as Papyrus came out of his room.

"WHAT HAS GOTTEN YOU SO EXCITED, SANS? IT'S NOT OFTEN YOU'RE THIS ENERGETIC. IS EVERYTHING ALRIGHT?"

"Papyrus you gotta listen to me. I need you to stay inside. Lock the doors," He ran into Papyrus's room and slammed the window shut, "and windows. Don't answer the door for anyone OK?"

"BUT WHY SANS? WHAT'S GOING ON?"

Sans ran back to his brother, "Paps please, just trust me. You trust me, right bro?" Without another word, Papyrus nodded, went back to his room, and locked the door.

Sans sent out a mass text to everyone he could think of, excluding his brother. It read,

This is Sans,

I bring grave news. King Asgore has been killed. Before you do anything drastic, I want you to sit and think it through. It's Chara we are dealing with. Do not get involved no matter how much you want to. Hide and prepare yourself. I will take care of her. Again, DO NOT GET INVOLVED.

He then sent out another text to only Undyne, Alphys and Toriel.

If I do not return, take care of Papyrus, will ya?

He then turned off his phone and teleported himself back to the Underground. He had a sickening feeling that he knew where she was. She was waiting for him in the judgement hall where they had fought so many times. Where she had murdered him time and time again. Killing him once wasn't satisfying enough for her, no, instead, she kept resetting. Killing him over and over for the sheer fun of it. Knowing that he would never refuse, knowing that he would wait, that he would fight, that he would die. And all the while, she would laugh, and laugh. It was all a game to her. It was fun to torture every living being in her path.

This time, it would be different. Sans was more prepared than ever before. He had, had time to prepare after a few years on the surface. He had learned new tricks and techniques. He felt more prepared than ever before and now, it was her turn to pay. Even if this meant that he couldn't protect the kid. Unfortunately, he knew that the kid would most likely not make it out of this. He had broken another promise but this time, he knew he could make it right. "She may be determined but I am too dammit," he said to himself.

He walked into the judgement hall, only to see another shocking display of violence. The kid, or rather, his/her possessed body stepping on the neck of an innocent Froggit. The poor creature was struggling to catch its breath under (Y.N)'s foot that was pressed down so hard, it left a distinct, red mark. Chara noticed that Sans had entered the room and turned to face him, finally letting her foot off of the winded Froggit which ran away before she could change her mind. Her eyes let off their distinctive, blood red glint. She was smiling, like always.

"Well, Sansy, here we are again," she laughed, "It's funny how easy it is to take someone's soul when they willingly do the thing that got them targeted in the first place. He's/She's not a very good listener is he/she? Well, that doesn't matter much now, does it?"

San's eye glowed a brilliant blue colour, "Of course not, Chara. I can't change the past, but I sure can change the future can't I? The birds are singing, flower-" Chara charged at him, swinging the knife in her hand wildly hoping to catch him by surprise. He dodged easily, sending bone attacks at her which pierced her skin, pinning her to the wall by her arms. Her screams of pain bounced around the room. "Well that was awfully rude don't you think? Interrupting me after kidnapping my friend? The least you could do is hear the speech I planned out."

"I think I've heard that speech enough for one lifetime, don't you think?" she growled.

"Eh," he shrugged, "I'm pretty lazy. I don't have the energy to make up a whole new bit of dialogue just for you, you know. You ain't worth the effort. But I dare say, you deserve this." He threw many bones at her that all lodged in the kid's flesh. She died instantly and reset. They were once again, facing each other in the judgement hall. He cleared his throat, "anyway, as I was saying. The birds are singing, flowers are blooming. On days like this, kid's like you should be burning in HELL!" And the battle began again.

The battle raged on for many long hours. Countless resets went by, but no matter how many, no matter how tired he became, Sans pressed on. They had long forgotten about speaking to each other but rather, jumped right back into the action. Each tried new techniques to one-up the other or catch them off guard. One false move on either person's part and they would be killed. Pillars were cracked, windows were smashed, floor tiles were thrown. It seemed as if the battle and destruction would never end but Sans knew how important this seemingly endless battle was.

Even if he had to fight her a million times, he would. He would in order to protect the ones he cared about. He kept the memories of his family and friends in the back of his mind. He had seen them fall so many times. He had watched as they were slaughtered in countless timelines. He thought of (Y.N) too. The poor kid who had done nothing wrong. The kid he tried to protect. Even though he had only known them for a short time, he felt a connection to him/her. But Chara had taken him/her too. The thoughts only fueled his rage.

After what felt like ten years worth of fighting, a reset took a long time to come. Sans leaned against a pillar, taking deep breaths. He wasn't convinced that she was through with him yet. He began to think it was a trick. She'd wait until he was asleep so when she reset, he was already asleep. Or perhaps it was a way to lull him into a false sense of security so when she finally did reset, it would catch him off guard. Either way, he was not going to let it happen.

Finally, she did reset but this time, she didn't attack him. She only smiled at him. "You know Sans, and I'm amazed that you haven't figured this out already, it's not me you're hurting. I'm merely in control of his/her body. I'm still incorporeal to a degree. So every time you hit this body with an attack, it's not me you're hurting. It's (Y.N)." He hesitated. "What's wrong Sansy-Pansy? Don't wanna hurt him/her?"

Your P.O.V

It was all true. Everything that Chara was saying was right. Every time Sans hit you, it hurt really bad. Each time you died, it hurt, but you kept fighting against Chara. She was in control of your body but not your mind. If you could hold her back long enough, Sans could win. You almost kept her from resetting last time. You had no idea how these resets worked but you knew you had to stop them. The battle began again. Sans and Chara were arguing with each other. You couldn't hear what they were saying but you didn't need too. You were only focused on ending this.

The battle went on for a long time and eventually both bodies became too exhausted to continue. You fell to your knees while Sans's head bobbed up and down in an attempt to stay awake. Both of you had no energy left. Sans was begging himself to stay awake. Despite his best effort, he fell asleep.

Chara walked toward him with malicious intent. The grin on her face only widened. She bent down beside him and whispered in his non-existent ear, "oh Sans, you never learn do you?" She raised her hand and swung it down, straight through his chest.