Koko is a high school girl who attends a coeducational school. She is shy and passive and has no friends. For a girl who loves trains, the train she takes to school is the most relaxing and soothing place for her. But in her sanctuary, there are some devilish men whose hobby is to molest innocent girls... Her bra is pushed aside, her breasts are fondled, and her pussy is violently fingered, but she cannot make a sound. Taking advantage of her serious and shy nature, a schoolgirl in uniform is molested in a public place, resulting in pregnancy!