Kohinata Asanaro is an average high school student who enjoys indulging in light novels, pornography games, and daydreaming about his female classmates. During his stroll home from school one day, he unknowingly frees a demon named Zepafur from a sealed bottle. Zepafur is determined to be repaid and announces the start of the "Lovey Dovey Harem Royale!" As a result, Asanaro's life turns into a romantic comedy filled with four girls from his school vying for his heart through a series of harem antics.
However, little does Asanaro know, the four girls are involved in a deadly survival game where failure to win his love equates to eternal torture in hell. The question on everyone's mind is: who will come out on top, and who will face their ultimate demise?
