Your girlfriend is crazy about me?

Chiho Tochikura is just an ordinary high school girl with big breasts. She has just started dating her wonderful boyfriend, and the day after she experienced her first exciting sexual experience, she was forced to drink alcohol at a welcome party for her part-time job, and was taken home by her senior. She was threatened by a flirty part-time worker, who did whatever he wanted with her body... Can a high school girl with big breasts protect her pure love? (She can't)