Help me find the sauce

I forgot the bl manhwa that I really wanna re read so l'm gonna tell you guys what I remember and Imk if you can tell me So basically I can only remember the 2nd couple of this story and one guy is really small with light brown hair with glasses and the other is a really tall buff guy with tattoos all over his body except his face and he has black hair. The small guy has never (I think) thought of homo sexuality but when his friend (the mc) got got together with a guy he was down to be super supportive and even bought things with rainbows on them. That's abt as much as I can remember