Lee Jinki,Kim Jonghyun,Kim Kibum (Key), Choi Minho and Lee Taemin are housemates. They are so close like a real brothers. They are also a college mates (Except for Taemin, He is a high school student) and some of them had fall in love. Who has fall in love???...and who is that girl??? What will happen when 2 guys fall in love with one girl??? Some teaser : "Are you OK, hyung?"