[ as bruno picks up the brush, nazuna puts his chin on mitsuruchin's head, as if to hold him still. he makes a comical face and stage-whispers-- ]

Bruchin, he's a little kid, he's almost made of rubber! He'll bounce back. [ you've earned a nickname, congratulations--nazuna's already fond of this nerd.

he wiggles his eyebrows. go for it! ] Just do enough to cover the side of his face, that's all you need. There should be plenty!