Can someone help me find this manhwa? I don’t remember the main couple, but the side cou...

Can someone help me find this manhwa? I don’t remember the main couple, but the side couple was a short nerdy uke and a hugeee seme. The uke found out the main couple was gay and dating so he started wearing rainbow clothes and stuff lol. That’s literally all I remember bc I read it so long ago. I think it’s a pretty popular one but I can’t for the life of me remember the name