Sachiko - 大奶子文科大学小妞

I'm Sachiko, an art student. I was supposed to do a naked male sketch for a college assignment, and I asked him to be my model, but he kept asking for me in the middle and I couldn't make any progress on the assignment. When I was troubled, he said, "If that's the case, your father can help you!" So I asked him to help me...