Both Mokko and Yukiki, from the same hometown and school, moved to Tokyo and ended up attending the same university, quickly growing close. After dating for three months, they now live together and enjoy a happy life... One day, Mokko's hometown senior, who still thought they were dating, came to their house and attacked Mokko, who was in a vulnerable state. The senior, a massive 150-kilogram man, overpowered the slender Mokko, pinning her down. Unable to resist, Mokko was repeatedly subjected to forced training and multiple acts of coercion...
