Comment by Starstruck on Missing Pepper Case - Chapter 18

Can someone help me find one manhwa that I read but forgot the name. I remember main character had a boyfriend but I know they kind of hard got together, had some problems I think. And that main character had group of friends and one friend was small nerdy with glasses. The boyfriend of the main character had an older brother but he was working in a mafia or some kind of “dangerous” job. He was tall, muscular, black hair, scary looking and protective of his brother(i think). Then the small friend of the main character and the brother of the boyfriend fell in love and they wanted to sleep together, but because the brother was big and everything, the small guy bought enormously large di*** that I think was rainbow colored and I remember that scene being so funny and popular. That’s all, I don’t remember the names of characters just that particular scene.