Storyline

A young man, Nanase, has been living an easy and dissolute life while letting his girlfriend, Mahiru, work. One day, triggered by a strange message, surprising incidents start to happen around him. It seems like there are more than two men who look exactly like Nanase, and there is a shadow of his father, a biologist who disappeared 20 years ago. There are also corpses of enigmatic beings from outer space...