“Can you feel that? Your hips are shaking.” Yui is a beautiful office worker who has begun working a full-time job for one year. She is admired by her colleague for her working efficiency and also her beauty. Her work is flawless, but her love relationship didn’t last long due to her overconfidence, so her life is still unfulfilled. Has been by her side for a long time is her weak-willed and softhearted childhood friend, Akira, who is also younger than her. Akira, who has been thought of as a cute younger brother by the girl he’s longing for, Yui, after an accident that made him kiss her, instantly turned into a beast?! He forcibly asked for her body and nastily whispered in her ear: “Yui...Your pantie is soaking wet.” It feels like he entirely turned into another person!