Taemin and IU are couple.. But suddenly IU must change school and move to another house. After a few weeks IU change her school and she must school at California . After few months, IU left him, There is a new cute girl name Sulli. She is new Taemin neighbor. Taemin accidently love Sulli after few years IU left her. Suddenly IU  come to see Taemin again, but