Since his freshman year of high school, Haruka Shinozaki has had a crush on the class representative, Akiho Kousaka. She is gorgeous, athletic, and an all-around ideal student. Shinozaki chooses to reveal his emotions because they are in the same class this year—and, to his surprise, Kousaka accepts to be his girlfriend! However, he discovers that Kousaka is weirder than he initially imagined: this seemingly ideal girl has never been in a relationship. Despite her inexperience, she swears to assist Shinozaki in whatever way she can... For example, he may learn several sex positions or have fetishes. Shinozaki attempts to reassure her that such studies aren't essential, but Kousaka devotes herself to make him happy in other ways.