Born as a succubus and dying as a human, the naive succubus ‘Tan Cho-ah’ decided to become human by gathering energy, just like her mother’s wish. She came down to the human world fully prepared to gather energy, but the human world she first encountered was not easy. Frustrated, a strange man ‘Cheon Sa-bin’ approaches her, and in order not to miss the opportunity, Cho-ah uses her succubus powers to seduce Sabin and successfully take off his clothes… What can be seen through his shirt that has been taken off are the wings of a giant archangel?! “‘I want to become human’… I’ll cooperate because it looks fun. You need ‘energy’, right?” Cho-ah has a hot night for the first time in her life with the affectionate but soul-sucking technique of the succubus…! ‘I’ve never heard that an archangel has this much stamina~~!!’ The naive succubus Cho-ah’s grand plan to become human!