Junpei Ichinose, a student at a magic school in Tokyo, is a dropout who has never discovered his magic aptitude. Suddenly, the beautiful witch Meryl appears before him and tells him, "I need your power, the reincarnation of the Demon King". Junpei finds out that he has the power of the Demon King. He learns that he has the power of the Demon King, and his secret is revealed to Sonia, a beautiful girl who is a descendant of a brave warrior. Junpei, who has no intention of becoming a Demon King, persuades Sonia to teach him how to use his power properly. However, the Demon King's power is the strongest and worst "erotic magic"!

The harem school battle to master H-magic with beautiful girls is about to begin!

The story begins with a mother committing suicide due to problems with her son. Following her miraculous revival, she comes to know that her son does not, in fact, hate her like she'd assumed he did. However, in exchange for her second chance at life she's forced into playing deadly mind games with others in the same situation as herself.

Alba Rose is a bartender with many secrets. He masquerades as a human, but is part of the cat population which ordinary humans despise. Even worse, before he became a bartender, Alba was a serial killer. However, thanks to the support of his fellow cats and the love of an orphan girl, Alba has been able to put the past behind him and start fresh. But can the past stay buried? Are Alba's days as a serial killer truly behind him? What will Alba do when a killer famous for brutally murdering cats enters his life?

A fragmented dream, a pigment of reality where surreal scars adorn the landscape. In it, there is a certain story, about a so called murderous cat given the brand "Serial Killer". The cat forced to watch this story must make decisions to find a way out of this intangible, dark world where nothing is as it seems