Daisuke Ichijo, the main character who received an air ticket from his grandmother Reika, set out on a small island, Amana Tsuchishima, with a circumference of about 80km during the summer vacation.
Daisuke was enthusiastic about enjoying his vacation, but by chance he met Mitsugu.
Naoto Mitsugu, who is delighted with that, seduces Daisuke with that hand, regardless of where he is.
