I might be wrong, but in 1 chapter it shows that he worked at a small restaurant.
It seems like he helps around a lot but all of it were like part times and stuff, I'm not really sure with all the panels with that information were all covered up by something or he straight up doesn't finish it. Im not really sure though.
Yeah yeah he's uncle shop but remember there arw times ppl ask what is his job the author just blocks the text bubble XD so everyone is kinda curious what he did/doing XD
What IS his job????????