Fitness Club Orgy

Gorgeous fitness club instructor with big breasts and round hips named Kana appears at a fitness club in the country that pleases men who are bored with their drab lives. One of her colleagues at the fitness club molests her while she's giving him a mock instruction. She tries to resist, but he threatens her. He thrusts her deeply as her legs are spread on the machine! He plans a "special lesson" with Kana and gym members, too...

(Source: Eromangajima, translated)

Note: Released in 3 episodes and sold as 1 chapter.