"Yeah.. Ah, okay. I'm at home." He didn't want to take the thing out of his apartment, even after managing to figure out how to make it change its shape back to being a notebook, and practiced just a little so it didn't change on accident again (even if he still got a little startled every time it changed shape).

"I didn't know that. I suppose that's good, at least... Even if owning a weapon never was a goal of mine." Chuuya might think it's unfair that Koutarou got a gun while he got a knife, or something like that, but Koutarou is pretty different from his cousin that way. Weapons are not cool.