I’m not sure if this is the one you’re talking about but this has a pretty similar plot https://www.mangago.me/read-manga/cozy_obsession/
Maybe cozy obsession idk
WAAAHH THANKS GUYSS(⌒▽⌒)
Man you spoiled the plot
waahh sorry that's the only thing i can remember. i even forgot the MC/ML names
i had to dive my list and i still didn't find the name. i think it was something abt MC likes to draw, and he believe he transmigated to a BL novel but in reality it was his real world afterall. aagh i forgot the name please someone ╥﹏╥