Responses
Love so pure
I know this one muahahahaha it's " LOVE SO PURE"
Are you perhaps talking about Love so Pure?
https://www.mangago.zone/read-manga/highest_order/
the korean bl that has a NERD character who is kind of homophobic and doesn't understand gays at first but then does a ton of research and wears rainbow underwear and round glasses and is also a bottom for a tough mafia guy <-- these two become the secondary couple
first couple is a guy who is very horny and it's related to his trauma + mafia guy's brother