Transferred student Haru Shibasaki is a mysterious presence! Her gender remains unclear, and no matter how much you talk to her, her true nature stays hidden. However, when she becomes completely naked, her plump breasts are revealed, striking you deeply. She might not be an ordinary girl—perhaps she's not even human? Falling in love with her, you're led to a shocking revelation and an emotional finale that brings tears, in this strange and captivating story.