She loves reading and studying. Koharu is a plain and serious honor student in class. But in reality... she's a dirty girl who loves naughty fantasies and older men...! "Uncle, let's have lots of sex today too?" As soon as the two of them are alone, she reveals a completely different, carnivorous, erotic face, and they have sex all day long, all over the house! She seduces the older man with her long, naughty tongue, and has sex with him with her delicate, white, sensitive body until he runs out of sexual desire, for 230 minutes of instant sex.