From a young age, Haru Kikuchi could see strange things. Invisible to others, these things grew more terrifying with each passing day, transforming into monsters that attacked and engulfed those around them. Not knowing who he was, Haru went about his university life simply avoiding the monsters. One day, on his way home, he was attacked and sent flying into an alley, where he inadvertently summoned a beast in the form of a beautiful human—!?