It's a story bout Lee Jieun(or better known as IU)with her dailylife facing friendship,love and hardship throughout her life.She's lucky she have best friends that always be beside her.Her best friends are sungyeol(that always with her),jiyeon,lee joon,kikwang,myungsoo(L),hongki.They are all enrolled to Kirin Art High School,but,suddenly one by one of her best friend started secretly to develop a feeling towards her.By the way,they are all a trainee that waiting for their debut.Lee Joon,Kikwang,L and Hong ki are going to debut in a group name Bleach.