Yeah. You know what it made me think of? That Yotsuha will die after killing the mastermind, but not having the chance to have the surgery. Uichi will end up blaming himself, because she didn't admit herself in order to be with him. He'll take the watch(as a memento), and unexpectantly travel back in time to become the Mastermind; to bully his past-self so Yotsuha will end up going having the surgery so she can live.Bad ending incoming?
Things are not going to go so smoothly no matter how good they look now
Yah shes obviously just going back to do surgery and then return like she originally did after her surgery in the OG timelime. She just needs to make sure he doesnt get depressed while shes awayGuys, remember: Yotsuha knows that Uichi would be unhappy if something happened to her. She has no intention of dying; that's the whole reason her treatment is a deadline in the first place. She's not about to sacrifice herself to save Uichi because she knows full well that Uichi wouldn't want that. He killed himself after making her cry; you think she hasn't thought about how her dying might affect him?
Not just that: she needs to make sure the mastermind is dealt with because she'll be bedridden or otherwise immobile for around six months. Six months in which this mastermind could either manipulate things to derail Uichi's life again, or escalate by deciding that Uichi's death is a good enough consolation prize, suicide be damned.Yah shes obviously just going back to do surgery and then return like she originally did after her surgery in the OG timelime. She just needs to make sure he doesnt get depressed while shes away