⁣Hatsushima Minoru was a high school student, who goes to Seiou Kan Gakuen High school which located on the hill in a historical town. He spent a carefree campus lives with his friends. One day in spring, his boy and girl friends announced that they began to go out with each other. Until then, Minoru hadn't wanted to have a lover very much. But he found he yearned for their relations. After a while, when his little sister took him to the tennis mach, he met Sakurai Momoko who was his senior student.

⁣Before the main character could subjugate Maina, Shino was already turned into an obedient masochist slave by the M Note’s power. Shino was going to just watch as Maina made the main character cum, but as the main character was about to make Maina his masochist slave, Shino pronounces that she already is a slave. Because there is a law that states there can be only one masochist slave to each master, Souta has to choose between the two, who battle by pleasuring him… Maina is used to reigning as ruler, but she doesn’t skimp on her effort as she gives the main character a boob job and even rides him. However, even that is futile with Shino in the mix. Shino’s gentle and caring fellatio and from behind sex causes Maina to feel a sense of danger… Feeling the biggest threat from someone so close to her, what move will the blonde bitch president take…