http://www.mangago.zone/read-manga/natsukage_ni_sayonara/ (please let it be right. please let it be right)
I'm not 100% sure, but could it be '' mr. mini mart '' by Junko ?
http://www.mangago.zone/read-manga/natsukage_ni_sayonara/ i would also say this one but i dont really remember if his family was rich
I'm gonna third The natsukage ni sayonara recommendation. It's not that his family is rich per se, but he's not hurting for money.
I'm pretty sure it's that series you're looking for
omg yes this one tysm!!!
any one know the name of this yaoi (or shounen ai i'm not too sure) where this boy gets a summer job because his family has a lot of money but he wants to show that he can make cash too and when he's at the job he meets a boy there and they build their relationship from there. when summer is over he leaves his job and they soon meet again around the winter time.