1. Dark Side
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.
Devils' Line — Season 1
2. Safe House
Trouble arises and blood is shed as Tsukasa tries to make sense of her new lustful feelings towards Anzai.
3. Paradox
Anzai takes refuge with Tsukasa after being suspended. Meanwhile, the authorities are on the lookout for a missing murder suspect.
4. Monster
A sniper is out for revenge. Another random passing half-devil helps Anzai to recover by giving him a taste of blood.
5. Plan B
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.
6. Dogmatic
Tsukasa is confronted about her relationship with Anzai. Anzai is called back into duty to take care of an emergency situation as he learns to accept his demon instincts.
7. Chaser
As Anzai is struggling to keep a distance from Tsukasa in order to protect her, she is kidnapped by a devil hunter.
8. Offline
After being involved in a risky situation, Tsukasa asks Anzai if they are dating. Will Anzai be able to control his bloodlust in a relationship with her?
9. Command
Operations within the police force get shaken up as Lieutenant Ishimaru becomes the new leader of F Squad.
10. Ego Defense
Anzai's ability to control his transformation is severely tested as he is confronted by a person from his past seeking revenge.
11. Ouroboros
Immediately after Lieutenant Ishimaru issues a deployment ban on devils from the CCC, the police force ends up in a risky situation.
12. Devil's Line
Tsukasa is willing to risk everything to rescue Anzai. Anzai learns about his past as he recovers from his injuries.