Myowol-guk, where rabbit spirit creatures 'myoin' gather. Nungso, the 101st prince of Myowol-guk, who is mixed with human blood and is bullied, receives the following tasks for coming of age. "Rescue the sacred and honorable 'Moon Rabbit' captured by evil humans and bring him back safely." Haru, a dalgona-colored brown rabbit imprisoned in an evil human's house... … . 'Hold on. To say that I was kidnapped and imprisoned... … .' One day, as a pet, you are terribly fond of it? Besides, to be called a sacred and noble moon rabbit, he reveals that he has no shame!