Ikaros is an Angeloid and falls out of the sky. Tomoki Sakurai is a boy who believes the most important thing is to live a peaceful life. The two live tougher. Tomoki Sakurai has never seen Ikaros smile. Tomoki Sakurai sees Nymph and Astraea laugh after they got free from the master?s rule. He hopes Ikaros can laugh like an ordinary girl.