In the summer of 1995, Mikiya Kokutou crossed paths with Shiki Ryougi, a young woman dressed in traditional kimono attire. Upon learning that they were classmates, he took it upon himself to get to know her. Despite her unconventional background and unusual demeanor, Mikiya was determined to win over Shiki's friendship, which he eventually did. Little did he know, this chance encounter would alter the course of his life in unforeseen ways as he begins to uncover a dangerous side to his newfound companion.