Jin (female) and Konoe (male) are twins and are just starting their high school career. Jin has always been a trouble to her brother, since she’s very tough and violent, and generally doesn’t behave like a girl at all. Konoe is determined that their high school life is going to be different, and he’s going to make sure she keeps acting cute and feminine. But it isn’t easy for Jin to pretend to be something she’s not…

When he was young, Kurosu Keisuke was in a special TV program showcasing children with supernatural powers, called “Esper Shounen”. Seven years after the termination of the program, a murderer appears to be targeting the Esper kids, whom he/she considers to be monsters. Will Keisuke and his old friends be able to discover the murderer and avoid becoming the next victims?!