You know, I wouldn't be surprised if his blood had some supernatural uses all things considered. Whether they would be anything good is another matter though.
@theonlykid i think it's the opposite. Nakano's black mist aura isn't going away and she tried multiple ways already, and they keep coming back. Think he might just die sooner or later and Senko is aware of this, and just trying to prolong the inevitable. At the end of this story it's gonna be a bittersweet one.
Nakano's lifespan might be a blink in the eyes of Senko, but damn if the can't make that blink the happiest of her life if he finally puts a ring in her hand.
@Xystus
i mean, there's literally no end where they stay together forever. Even if the curse IS dispelled somehow, he's just a guy, and he's already, what, near 30?
he's going to die, she'll still be around. but at this rate she won't get to fuck the next one, because he's too busy with her.