[The future is what they're fighting for - what they're always fighting for. A peaceful future where no one has to face something so terrifying. It wouldn't be perfect but they know they can come close.
Maybe Soushi isn't trying as hard as possible to leave the Dome. He reads and studies and searches for information but he isn't in a hurry to get home. Not when he knows the future - that he'll be there to fight alongside everyone else. As long as they're okay, then he's in no real hurry to leave. Soushi can focus on not just getting himself home but everyone else (who may want to leave) as well.
Ah, his heart hadn't been pounding before but it most certainly is now. Kazuki closes the little bit of distance between them and they connect. It doesn't seem like it'd be much but it is and so much more. Because it's Kazuki. Kazuki who was his best friend as children, who he distance himself from after learning the truth of the world, who he wanted to protect but had to drag into the battle. Kazuki who he was always there with whenever he fought, who ran away in order to understand, who kept him close when he he had nothing else to hold on to. Kazuki who was the first person he saw again, who he went into the unknown with, who was always always by his side even when no one else could see it. Even here and now they were together.
Without Kazuki, he wouldn't be anywhere. There was the simple truth of it. Kazuki was his tether - his everything. He doesn't need anything as much as he needs Kazuki. It hardly matters in what capacity he has Kazuki - just so long as he's there.
Kazuki is the reason for his existence so it only seems right when he takes away his oxygen. He moves until there's no space between them and lifts his free hand to slip into the other's hair. It's so different from the last time he touched Kazuki's hair, though it's just as dark tonight as it was the night he cut it. Watching Kazuki from this distance is impossible so he allows his to close.]