A mysterious invitation has come to your place. Invitation to stay at a luxurious mansion. At first you thought it was a joke. However, all of your high school friends also said that they received the invitation, so you accepted and decided to go. You think, this is a reunion event. They all gathered in the hall of the mansion, very lively and bustling before all the excitement ended in a tense atmosphere. It was Kiyoomi, he was the one who planned this reunion event as a place of revenge.