The cute and sexy Iori Furukawa takes on the challenge of being a high school girl for the first time! Iori, a top sprinter on the track and field team, falls in Kokoro with a man she meets by chance while sheltering from the rain. She later finds out that he is the basketball club's advisor, but she is drawn to him and they enter into a forbidden relationship... In the rain, covered in sweat, they make love while soaking wet, and have sex that is more erotic than being naked!