Warau Hyouteki

Yuzuru considers the childhood agreement to marry his cousin Azusa a forgotten family arrangement. He now loves Satomi and enjoys an ordinary school life. Azusa's arrival after her mother's death makes it clear that she has never accepted the same interpretation.

Her insistence on claiming Yuzuru turns frightening when Satomi becomes the target of inexplicable attacks. Behind Azusa's jealousy lies a supernatural power and a deeply disturbed past. Yuzuru must recognize the danger in time to protect the girl he chose, rather than the future chosen for him.