Ryugazaki Naomi Ryuji is a living soul between the heaven and hell. Heaven didn't accept her and even hell for some reasons. She stayed between them for 300 years seeing other souls went to heaven and other sinful souls at hell. Then after a long wait, heaven and hell decided to bring her back to the world of living as an immortal because both of them couldn't accept her. She thought being an immortal was fun but could she handle all the struggles she will get?