The story takes place on a star-shaped island with an everlasting summer and a pleasantly refreshing climate. It’s almost like paradise. An island where everybody can be happy. The protagonist in the story has just transferred to the school on the island. Where shortly after arriving he meets an AI in the shape of a girl named “Ame”. She’s responsible for maintenance of the island, and guides him to the student dorms.
Waiting for him in the dorm and at school are the other 4 heroines in the story. They are all vastly different and include a flawless oujou-sama and a girl stuck in her own childish dreams. Just what kind of happiness is waiting for our protagonist?