Yu Akimoto, 27, is a glamorous woman blessed with both beauty and style. Her father runs a real estate company, where she works as a clerk. Born into a wealthy family, she was raised in a very overprotective environment. Her father told her she could take time off work whenever she wanted, so she rarely works. She says she's naive and troubled by her naivety. Now that she thinks about it, her gentle expressions and the way she speak suggest a relaxed lifestyle. She's only had three partners, which is quite a low number for a 27-year-old. Of course, she's had some sexual experiences, but they're quite limited. She says she's never even had a partner perform cunnilingus on her. She suspected her father's strictness while living at home was the cause, so she persuaded him to move out on her own, fulfilling her dream. She says she wants to experience more things in the future... and so she unexpectedly decided to appear in adult videos. She wants to break away from the path her father laid out for her. It turns out she has quite a bold side. How will this sheltered, naive girl become aroused?