Mahiru is a boy who loves simple things and hates troublesome things. He decides to take a black kitty home, but soon...

Mahiru's pet Kuro turns out to be a servant vampire, or servamp. Mahiru rushes back to school to find out what happen...

Mahiru finds out that his best friend, Sakuya, is actually one of Tsubaki's subclass. Why did he get close to Mahiru ...

Mahiru nearly gets consumed by the power that he had asked for, but a stranger with the servamp of Envy comes to save...

Mahiru continues to meet new people one after another. Next, he meets a strange boy carrying a coffin at the summer f...

Mahiru meets with another suspicious character, a visiting pianist from Austria. He comes to find that the pianist, L...

Kuro continues to act strangely ever since Lawless brought up the past. Mahiru steps gingerly around Kuro, unsure whe...

Kuro has been trapped away in a ball and the others will have to try and rescue Licht and Lawless before midnight wit...

Misono and Tetsu go to save Lawless and Licht while Mahiru wanders within Kuro's mind to find a way to save him. Miso...

Licht breaks through the wall to give Lawless a piece of his mind, face-to-face. Licht gets swallowed up by the darkn...

Licht and Lawless fight against Higan while Hugh lets his guard down due to the prideful idea that subclass could nev...

The final battle is here and Mahiru struggles to get to Kuro as he steps forward and tries to face it all. Kuro faces...