>>717296628
I imagine he'll be acting normal in his 20s and onwards since he was already shown to have mellowed out a bit in HA. He's going to Tokyo, so maybe that means having a job with popularity attached to it.
My theory's that since he's got a decent voice, he might become a singer to try and get into sex scandals with his fangirls. If he grows his hair out he'll look like Weird Al too, so that makes it even better. Weird Shin Makiri