AVSA-427 - A kind-hearted, service-oriented girl named Ichijo Mio who allows free use of her mouth when asked seriously, featuring "throat-irritating training", "20cm large penis breeding", and "nasal discharge". Details include throat bulging, neck constriction, exposed uterus, and a confessed Dom/submissive nature.

No matter how much she dislikes or suffers, her good nature prevents her from refusing. She is teased and trained with fingers inserted into her throat while saying, "Just a little." She listens to anything said to her, responding with "Yes, it's painful, but it's okay" and "You can do whatever you want." Starting with fingers, a huge penis is twisted inside, and she gradually begins to feel pleasure. Tears and throat mucus are shed, and the mucus is applied to her vulva, leading to a Dom/submissive transformation where she says, "Please crush my uterus, I beg you." Gathering more men, she receives three 20cm-class penises. She says, "It's okay, boys like this," fulfilling any wish. Mio-chan has a Dom/submissive, perverted constitution.