Tomiokas pov

Her plan ? I wonder what she thought of , after all she herself knows that without anything special or something she won't be able to even scratch Douma.

„Well , I'm ready. Tell me your plan, maybe it can help us"
Her face didn't change , that scary smile of hers was still present , a shiver ran down his spine.
I feel like something terrible is going to happen. I've never felt anything like this before , what's happening ?
„I think that you yourself would do anything to kill uppermoon 2, am I correct ?" He himself knew the answer. Of course he would ,after all this was what he ever wanted to accomplish in his life.

But something in him wanted to disagree. It was a strange feeling, that warned him to be wary of the consequences of his words and actions. But he decided to be honest with her,because he needed her to trust him and he wouldn't want her to lie to him, so he wanted to be fair.
„That's correct."
The smile on her face didn't disappear at all , if anything it became more scary.

„Well, you should know that I myself would also sacrifice everything , if it would mean that my success is guaranteed." He arched his eyebrows. Something inside him told him what she wanted to say , but somehow he didn't want to jump to conclusions yet.
„With sacrificing everything I also meant my life , or rather especially my life."

His eyes widened. He didn't know why, but the thought of her dieing killing douma was not very appealing to him.
„So you mean you want to throw your life away to kill him ? Isn't that a bit overkill ?"
He was suprised by his own words. Originally, he didn't mind being killed by douma when it would mean he would win, because his revenge was the only thing that prevented him from killing himself.

Shinobu was also suprised by his words. „Overkill? Tomioka,that demon had killed my sister! I would do anything to win! Don't you lie to me and say you hadn't thought about that yourself. I can see the hatred in your eyes ,can hear the anger in your voice. I've only recently found out about your real self, but I'm pretty confident to say that this is something I've figured out by now. You know that being a demon slayer is very risky, we expect to die any day , so what's different about my willing sacrifice?"

Giyuu sighed and put a hand behind his neck, scratching it.
„There's a difference between going into a fight expecting the chance of defeat, or being 100% sure that you'll be defeated. Also, why even consider sacrificing yourself when your not alone anymore ? I mean I really understand your intentions, as this was also my way of thinking but please think about one thing. Imagine we're in the final fight and we both die because we both made a plan to sacrifice ourselves just for the sake of the battle against douma, what about the other hashiras ? What if they are going to fight Muzan and they loose because we selfishly decided to kill ourselves ?"

Shinobus pov

Her eyes widened. He is right ! What if we loose against muzan because we die on purpose !
She wanted to say something, but as soon as her mouth opened, he spoke again.
„Kocho , wasn't one of your goals to protect humanity? If we would die and the other hashira would fail and also die, then the circle of terror would continue. Many people would continue to die, and it would be our fault, do you really want that to happen?"

She couldn't answer him. Everything he said was right, but she didn't want to accept it. She knew that she was being selfish, but she never thought about the future, about what would happen after her death. Yeah, uppermoon 2 would be dead , but muzan was a way bigger threat than him. She closed her eyes. „Well, what do you propose then, Tomioka?"

He sighed again. „I don't know if I'm being honest. Do you think the two of us would be enough to kill him ?" His question was genuine. „Well, I mean we are the two smartest hashiras, I'm sure we'll somehow find a way. Everyone and everything has a weakness, so we can kill him I hope."
„Tell me your originally plan please,I'm curious." tomioka suddenly said.
She wasn't sure if this was a good idea, but she told him anyways.

„Well, as I said, I don't think that my normal poison could even scratch him, so I thought of another way to poison him. So...it was a plan I made not so long ago, so I haven't started with... doing this. I only created the poison. Fact is, that poison only works in a large dose, or else it would be totally ineffective. I was planning to...inject the poison in my blood. The goal was to have atleast as much poison in my system as I weigh, that way my plan would be successful. I wanted douma to absorb me, so that he absorbes me and gets poisoned. I planned to tell Kanao about my plan, so that she could finish douma after I poisoned him."

Tomioka looked thoughtful. „I mean, the plan itself is not bad..." She looked up, suprised. „But it has a big weakness." He added. What ? This plan is perfect ! There ain't no weakness to it .
„Well, mister I'm so smart and know everything, what's the weakness then ?" She couldn't accept that. To make that plan took her so long, especially the production of the poison.
„Seems like you forgot that your plan can only function when one condition is fulfilled. The condition I'm talking about is, that douma will absorb you. What if he gets the orders from muzan to kill the other hashiras ? What if the timing of Kanao coming to kill Douma is to early and he wouldn't get to eat you ? There are so many possibilities that could lead to the failure of your plan, and then, your sacrifice would be in vain. Honestly, have you never thought about that ?"

And once again, she was stunned. His analysing skills were out of this worlds, even better than hers it seemed. It was like he could point out any weakness of a plan. His arguments were always logical and he always notices things nobody ever did. He's a genius!
Somehow, she wasn't angry at him. She always found reasons to be angry, but it seemed like he had no flaws. He was considering everything, the feelings of a person, disadvantages and even the possibility of any outcome.
A strange feeling arose in her, though she couldn't quite pinpoint what it was. She was just happy that Tomioka showed her, that her seemingly perfect plan wasn't perfect at all.

„No, I've never thought about that. I was just...blinded by my rage. Honestly, how are you able to still think rationally even with that burning hatred in yourself ? I really want some advices." He just shrugged. „I've always had to keep my emotions at bay and learned to suppress them. That was the only way I could keep my sanity. I also never wanted to intentionally die against uppermoon two, so I really needed to think about all possibilities to survive, so that I can still safe humanity and kill Muzan."

She smiled. But it was not a fake smile, it was the realest smile she ever smiled since her sisters death.
I'm so grateful for the fact that I'm not alone in this anymore. Thank you, Giyuu.