Koharu begins to grow distant toward her boyfriend Tatsu, leaving her troubled. Taking advice from the mysterious counselor Mizuki, her confidence steadily grows. Learning various kissing techniques during sex, approaches to a man's body, and the secrets of skilled blowjob techniques, she transforms into a woman who fully satisfies him. Practical methods designed to draw out his complete desire are demonstrated. Koharu, played by Reo Saionji, is portrayed deepening her relationship with her boyfriend.