The story starts with Sanda, a second year middle school student, getting attacked with a kitchen knife by his classmate Fuyumura. While Sanda couldn't make sense of the situation at first, he gradually came to believe that Fuyumura's actions were just mean acts stemming off from the latter having a peculiar puberty phase. But that was all actually a misunderstanding. Fuyumura is seriously questioning if Sanda is actually the descendant of a certain family...

In the middle of a ball, Scarlet's fiancé, Kyle, suddenly calls off their engagement. She's falsely accused of being a bully and people unfairly call her a "Villainess." The aristocrats and noble families all denounce her. For years, she had to put up with his abuse and idiocy, but she can't take anymore of it! At her wit's end, she asks for one last favor; to give him a good fist in the face. So begins Scarlet's story of revenge against Kyle and his cronies! A fantasy about an elegant yet rebellious fighter, who doesn't let anyone take advantage of her!!

Two years ago, the death of Naoto Watari's parents left him as the sole caretaker for his younger sister Suzushiro "Suzu" Watari and forced him to move in with their aunt. So devoted is he to Suzu that he refuses to join clubs or even hang out with anyone, earning him snide comments and the title of "siscon" at his new school. But as long as Suzu is safe and happy, Naoto doesn't care what everyone else says. However, his sneering classmates may turn out to be the least of his worries. The sudden transfer of a girl named Satsuki Tachibana brings back traumatic memories from his past—a past she had a hand in making so unpleasant. Nasty secrets, unknown to Naoto, begin to surface with her arrival, threatening his new life.

It is the Edo period. Ichitarou, the young master of Nagasakiya, one of the largest stores in Nihonbashi, has been in poor health since birth and is unable to go out. However, Ichitarou is always protected by demons such as Shirasawa and Inugami, who serve him. One night, Ichitarou goes out secretly and witnesses a murder. From that day on, bizarre murders begin to occur one after another in Edo... With the help of the demons, Ichitarou's search for the culprit begins!