"I love you, that's why I will eat you, yes". The one who appeared in front of Ano Taiyou introduced herself as Kagen, a girl who came from the moon! Staying true to her instincts as a tsuki-jin, Kagen's reason for meeting her first love, Taiyou-kun, was… In order to prey upon him?! This is the start of a "Predacious" Slice-of-Life Rom-Com!