Azumi, who teaches children in a calligraphy class, is Kokoro by the erection of her student Kenta's handwriting one day. Azumi, who can't get the boy's penis out of her head, sucks Kenta's handwriting in the bath and teaches him how to do a titty fuck. Then, she finally does the forbidden thing of inserting it raw and cumming inside him. On her ovulation day, she sucks all four of her students raw and makes them cum inside her 10 times in a row.