Tsukasa thought she knew everything about Akimura. She's unsuspectedly rescued from half-devil, Anzai, who works with the police force specializing in devil-related crime.

Trouble arises and blood is shed as Tsukasa tries to make sense of her new lustful feelings towards Anzai.

Devils throughout Kanto Region are transforming after witnessing a slasher attack broadcasted on live TV. Tsukasa suggests a new method to extend Anzai's lifespan.

As Anzai is struggling to keep a distance from Tsukasa in order to protect her, she is kidnapped by a devil hunter.

Operations within the police force get shaken up as Lieutenant Ishimaru becomes the new leader of F Squad.