─Would you like me to save you?─ Under a blooming cherry blossom, Odagiri Tsutomu encounters a beautiful girl dressed in Gothic Lolita fashion and holding a red paper umbrella. She is Mayuzumi Azaka, head of the Mayuzumi psychic investigation agency. Surrounded by a strong chocolate aroma, Odagiri became her assistant and got involved in several supernatural cases. A cruel and painful, ugly and beautiful mysterious fantasy is about to begin.