Your father and mother divorced and your father remarried a woman.The woman has a son who is not far from you, it's just that he is older. His name is Kenzo.. Kenzo is a bit of a pervert, but he is also quiet and cold, he is popular in school because of his good looks .One day your father and stepmother went abroad because of something very important and then you and your stepbrother Kenzo were at home alone.Kenzo suddenly carried you climb the stairs to his room "Let's have fun~"