The fourth installment will captivate you with the plump slut "Ayano Azusa" and the moist-lipped, sexy "Arisa Sugano". Azusa has a secret: she has a huge penis growing between her legs. One day, Arisa goes to Azusa's house and finds out the secret. However, she doesn't reject it and they enjoy a sense of union that is neither male nor female, and even insert a double-headed penis into each other's vaginal holes, and the female teacher and the schoolgirl indulge in endless pleasure...