NACR-140 Nao Jinguji, a beauty college student with a perky ass

I'm Nao, a student at an art college. This time, I had to draw a nude man for a school assignment, so I asked my boyfriend to be my model, but he started making advances on me halfway through and I couldn't get the assignment done... I was worried, but he said, "If that's the case, I'll help you!" So I asked him... But when my dad got naked, he was rock hard...