the uke were introverted and he liked to paint ad the seme had many friends(they werent introduced in manga though) but he preferred to hang out with uke, and they both modeled in art classes and got some money from it, i think, and they once modeled together and there were some fujoshi girls and they were giggling to them, and they both were virgins, or at least the uke were. it were really cute and fluffy and mostly shounen-ai. if you know this please share ur knowledge(づ ̄ ³ ̄)づ
I'm not sure, but it fits the second part of your description
http://www.mangago.zone/read-manga/recipe_no_oujisama/
It starts off with explaining how the Uke older brother was going through exams to get into college i believe and he was super stressed and used to beat the mom everyday and the uke at the time was very young and was scared of his older bro, then one day the stressed bro came in his room and i think touching him all over? Wen the uke got older he used his older bro guilt against him and will make his brother watch him have sex with strangers?
(i havent readed it myself, i just saw someone asking about it, and it sounded kinda cool so if someone knows what it is plz share ur knowledge(づ ̄ ³ ̄)づ )
I just read it while listening to Katy Perry part of me. Some it matched
day always gets better when this manga have update <3