Season 1 - Operation Love

Iwase Ken and Yoshida Rei have been friends since elementary school. Ken, is obstinate and unskilled in love, but he fell long ago for the lively and cheerful, Rei. But Rei is about to get married to another man. While Ken and other friends from high-school attend the wedding ceremony, a fairy appears and sends Ken back in time, giving him a second chance to win the girl he loves.