Yuina, a girl in love with her non-biological brother, lives tormented by her lack of self-confidence. One day, a mysterious voice guides her to an unknown world. Without understanding what is happening, she is attacked by a man. In that desperate moment, she is saved by the specter of a succubus that possesses her body. The succubus defeats all enemies by fucking them, regardless of what happens to Yuina's body and mind. Thus begins the adventures of Yuina, an insecure girl in an unknown world, “connected” to a perverted succubus.

Yuna, trapped in the world of succubi, is given the challenge of seducing Vulcan, a man who despises succubi, as a test of her skills. Vulcan, bitter due to his past, resists, but his succubus friend uses Yuna’s body to attack him with seductive techniques. To return to her world, Yuna must reach the Succubus Queen in a castle protected by a barrier, all while continuing her daring training as a succubus.

Yuina, continuing her training with the new goal of meeting the Queen of the Succubi, is one day approached by the master of a tavern with a request for help — they seem to be short on waitresses. Yuina offers to help, but there’s no uniform that fits her. So, the succubus suggests heading to a seaside cave to collect materials for a new uniform. Although Yuina once again ends up in lewd situations in the cave, she manages to obtain the necessary materials and successfully creates a new uniform. However, when she starts working at the tavern, she somehow ends up surrounded by the customers! Why is this happening!? “N-No, please… I’m still taking orders…” While enduring naughty teasing from a giant creature, she manages to secure the golden coral. Using that material, a super-erotic waitress uniform is made, leaving her breasts completely exposed. To all the drunken perverts at the tavern: Come and enjoy a fresh-squeezed, creamy white cocktail splashed all over Yuina’s small chest!