Previously on Chapter 10

"I'm sure the whole world would be moved to tears by your merciful death sentence..." he said, letting out a soft chuckle. I just stare at him with worry. I can't believe he's so calm and even able to laugh at a situation like this. I have to do something to prevent this. I don't wanna lose Senku.

-This Can't Be-

Y/N P.O.V

Tsukasa keeps staring at Senku. I know what he plan to do to him. I quickly steps in and stands in front of Senku, shielding him from Tsukasa's hateful gaze.

Tsukasa gives Senku a small smile. "But before that, would you give me the recipe for the revival fluid?" He said. I can hear his voice is full of hostility. The revival fluid is the only thing that Senku have as a reason for Tsukasa to not kill him.

"Nope, sorry... I guess I'm not as kind as you are. I can only look at things as being logical or illogical. I don't care one millimeter what you do with that girl. There are plenty of other females to revive. And not to mention, I already have a girlfriend..." Senku said, turning to look at Tsukasa. With one swift move, Tsukasa cuts Yuzuriha's hair. I let out a gasp at the sight.

"Don't try to negotiate, Senku. You never buried Yuzuriha like you should've. Your best move would've been to take her while she was still covered in stone and put her deep in the ground somewhere in a place I couldn't find her. And if I thought of that, there's no chance in hell it never crossed your mind. But for some reason, you didn't do it" he said. Senku stays silent after he said that. Tsukasa is quite smart.

"Was it for Taiju's sake, or was it for Yuzuriha's? No. I think it was for both of them" he said. I just stare at their interaction in worry. If Senku told Tsukasa the recipe, he would have no reason to live. Tsukasa will kill him, after he learns the recipe of the revival fluid. There's no doubt in that.

"You call yourself logical, but you have your precious friends to care for. I always had tons of admirers. But there's no one I'd truly say is precious to me. There is one... but it does not matter now. And because of that, this is my win" he said.

Yuzuriha let out a chuckle. I turn my head to look at her. She's holding her hair. "I really appreciate the haircut. It'll be a lot easier to care in this world..." she said. She grabs the sharp end of Tsukasa's spear, placing it near her neck.

"Please, don't give him the recipe, Senku-Kun... as long as he doesn't know how to make it himself, he'll have no choice but to let you live. He can't kill you... I'm not important at all..." she said. I just stare at her in sadness. She's ready to give her life.

"But you? You have to survive, for everybody's sake. To make sure they have a future. Also for Y/N's" she said. Senku glance at me for a few moments. He let out a sigh and take a deep breath.

"The revival fluid is a combination of nitric acid and alcohol. First, you gotta filter the miracle fluid from the cave, then mix it up with alcohol that's been distilled to as close as 96% as you can get it. The ratio is 30% miracle fluid to 70% alcohol, and if you're off by just a few points, the reaction won't happen" he said. I stare at him in disbelief and sadness. Tsukasa stares at him with a smile.

"Thank you so much, Senku... and now, I no longer have any reason to let you live" he said. He push Yuzuriha aside, making her fall. He jumps down the hill and stand in front of Senku. He takes a few steps closer to him.

"No!" I yelled out. I rushes to stand in front of him. I outstretch my arms on either side of me protectively. "If you want to kill Senku... you're gonna have to get through me" I said. Tsukasa stares at me.

"Step aside, Y/N. I do not wish to hurt you" he said. I shake my head stubbornly. "I don't care... you're not going to hurt him!" I said, glaring at him. He let out a sigh and jab me in my stomach. But for some odd reason, I feel like he's holding back. Even so, it still hurts.

"I'm sorry..." he said, looking down at me. I can see a look of regret in his eyes. He turns to look at Senku. "Let's say I did let you live, right?You would develop civilization just like before. Can you promise that you won't do that?" He said. Senku let out a chuckle at what he said.

"The hell are you talking about? I could promise anything to stay alive" he said. Tsukasa gives him a tight smile, shaking his head.

"No. You would never lie. Not when it comes to science. So will you promise me, here and now, and for all eternity, that you'll abandon science? Because if you can make that pledge, you can live, and then I won't be forced into killing you" he said. He glance at me for a few seconds, before turning to look at Senku again.

"No, I can't. I can't do that..." Senku said. Tsukasa let out a sigh at what he said. "Of course not. I knew that would be your answer..." he said. Senku cracks his neck lightly.

"Just kill me in one blow, because making me bleed to death would be illogical for the two of us..." he said. Tsukasa nods his head at what Senku said. "Don't worry, Senku. I'm going to sever your cervical nerve. It'll be instantaneous... you'll be knocked unconscious and die without suffering. I won't miss" Tsukasa said.

"N-No..." I said, struggling to get up. But the pain in my abdomen, forbids me from getting up. Tsukasa turns to look at me. His eyes looks sad and... regret?

He turns to look at Senku. "Senku... I have a feeling. That if we had met each other 3,700 years ago... before all this... before the planet was turned into a Stone World. I think that you might have been... my first real friend..." he said. Senku just gives him a small smile. "Maybe..." he said.

My eyes widened in horror as Tsukasa raises his weapon. "No!!!" I yelled. He swings it, hitting Senku right on his neck. Senku's body starts falling onto the ground. Right at that moment, Taiju comes rushing towards us.

I shake my head, forcing myself to stand up. I rush over to him and cradles him in my arms. I shake my head as I stare into Senku's eyes. They're devoid of any signs of life.

Tears starts falling from my eyes. I shake my head as I hold him closer. I let out a sob, crying as I hold him tightly. "No, Senku. This can't be. Please tell me this is a nightmare... you can't die on me, Senku...

SENKU!!!!

*to be continued*