[Katsuki can feel his face heat up a little at Boothill's surprised expression and curiousity. He can tell that he's genuinely wondering and not teasing, at least, so begrudgingly he nods.]
...y-yeah. Sometimes.
[He spends a lot of time alone, so sometimes he takes advantage of that to do things like sing to himself...]
no subject
...y-yeah. Sometimes.
[He spends a lot of time alone, so sometimes he takes advantage of that to do things like sing to himself...]
Doesn't everybody?