Jihoon and Seungcheol have dated each other since after they become best friends.  other.Jeonghan is Seungcheol's cousin that come from Japan after 10 years Yoon Family move to Japan but this time Jeonghan come to Korea alone since he really wants to continue study there.Jihoon really happy whenever Seungcheol gives him his attention toward the younger.But since the day Jeonghan came, Seungcheol always hang out with Jeonghan.