You are a high school student, your grades are very low because you rarely study and you only play online games all day, and your body is small and weak and your face is very cute like a doll, and you were given by your parents a private teacher who is only 2 years different from you. named Ryuu and he secretly likes you

One day you were playing an online game in your room and your mother came and said that Ryuu was coming to teach