Sachiko, the art university student with a beautiful buttocks, NACR-300

I'm Sachiko, an art college student. This time, my assignment was to draw a male nude. I asked my boyfriend to be the model, but every time we got halfway through, he couldn't help but want to have sex with me. So I had to go home and ask my dad. I didn't expect that when my dad took off his clothes, his penis was bigger and harder than my boyfriend's...!