Kurono Maou/Plot

Kurono Maou was originally a student in Japan and a member of his school's literary club. At the start of the series, his classmate and a member of the same club, Shirasaki Yuriko lied to him and told him that their club was going to have a meeting so that she can confess her feelings for him. However, at the moment when Yuriko is about to confess her feelings for him, Kurono suddenly felt an intense headache and passed out.

At the time Kurono regained his consciousness, he realized that he is in an unfamiliar dark room which suddenly turned bright. Afterwards, multiple people dressed in white approached him and forced him to wear a ring that has 7 needles popping out, causing him to lose his consciousness again. The moment he regained his consciousness again, he realized that he didn't die, but was forced to submit and obey all of the white men's orders.

Kurono was then subjected to various tortuous experimentations and body modifications to enhance his physical abilities and to be capable of using black magic. After the experimentations, Kurono was forced to fight to the death against various monsters and other experimental subjects. Until one day, Kurono fought and killed another Japanese person and with the realization that he killed another human from the same country, caused him to experience a mental breakdown. Though despite this, he still didn't completely break and retained a small amount of his ego and personality, maintaining it until the ring in his head forcibly shut down all of his consciousness.

The next time Kurono regained his consciousness, he realized that the ring that forces him to obey them is gone and took that chance to escape from that place. When he was about to escape upwards, Kurono met Sariel and after a brief fight, realized that Sariel is far stronger than him, causing him to run away from her out of fear. At the time he was running away from Sariel, he saw an underground well and jumped into it to escape from her.