Runa, who has a beautiful, well-proportioned body and a healthy, cheerful smile, is a sports instructor working at a certain fitness gym! However, when you actually talk to her, you will find that her gentle tone of voice is different from the impression you get from her appearance, and the contrast will make your heart flutter. She wants to get certified as an instructor overseas, and she says that when she exercises to the point of sweating, adrenaline is released in her body, making her feel horny and horny...