I forgot the title of this manhwa....

There is one manhwa where the main character has (I believe) purple hair and the guy he likes has pink hair. The pink haired guy is a delinquent who loses his memories and then falls in love with the purple haired guy (who conveniently decides not to tell said pink haired guy that he a) dislikes him and B) is actually a pretty horrible person, though it's not his fault) (honestly when is it ever?) Anyways if this rings a bell to anyone please tell me!!