Daiki is a perverted teacher who loves to see beautiful girls endure embarrassment. Daiki has enjoyed watching his childhood friend Hina endure her shame by tying her up and playing with her in every possible way. He was looking for a new subject to take advantage of his recent rut and his own position... Mina Shijo, a beautiful girl who comes up as a candidate for such a pervert. Mina, the daughter of an old family, is a good-natured, cheerful and good-natured girl who gets along with everyone. But she's also a somewhat dim-witted and unfortunate little girl who goes into the wrong things without a second thought... He plans a situation where she can't say no to him and he quickly forces her to become a test subject, which is perfect for Daiki...