trying to find a manga

so the manga is about this guy who has work and stuff. i think he wasn't very lively because of work. but then he meets this guy who has either a son or a little brother. the guy with the kid also has a dad who isn't that old so the kid probably just is a brother. anyway, the way they met was when the working guy was eating a rice ball and the little kid came up and asked for one. he shared it but then the little kid's brother came and scolded him. anyway, the working guy got with the guy with the kid of course. sorry if this was hard to understand, but thank youuu