Chihiro-sensei has been assigned to teach her first private lesson as a tutor. On her first day, she was extremely nervous—though she managed to get through the lesson, deep down she felt herself tempted to give in... At the end of that day, she couldn't bring herself to say the words: "Mr. ○○, do you want to have sex with me?" But as the lessons continue, she gradually finds herself able to speak those words aloud.