Even though I have a girlfriend, the one who is thrusting her desires upon me is... a beautiful health teacher and god. Shiro is a high school boy who is constantly teased for being short and unmanly. But he has a girlfriend, Aino. She is popular in class with her cute appearance and kind personality, and Shiro's heart is always pounding.However, he has a secret. He is conducting lewd experiments with the beautiful witch in the health room, Sumeragi-sensei. And she also has a secret...A lewd, secret game with a superior being that he cannot tell her about.