Seduced by his girlfriend's younger sister, whose breasts are even bigger than his girlfriend's (20), and subjected to continuous penetration sex. Eri Inan SDMUA-045

For the first time in my life, she was my college classmate. I'd never done anything like H before. Her younger sister, Erika, was taking exams next year, so I, being good at math, decided to be her tutor. That carefree feeling of "being lucky to get a job and go to her house" was quickly replaced by Erika teasing me about being a virgin and even using her large breasts to seduce me…