for the first time in my life, she was my college classmate. haven’t played h yet. her younger sister erika is going to take the exam next year, so i, who is good at math, decided to be her tutor. it was a lighthearted feeling like “i’m lucky to get a part-time job and go to her house”, but my younger sister erika teased me as a virgin and seduced me by showing off her boobs…
