21-year-old cheerful sales clerk Koharu participates in an overnight trip with a handsome male actor after responding to a casting call where failure in a game results in sex. She is the type of girl who genuinely enjoys sex. Their destination is Nikko, a place full of adult charm. A giant maze challenge adds excitement—failure to reach the goal within the time limit triggers an erotic punishment game. Crossing a suspension bridge and ringing the "bell of love" heightens anticipation for sex. At a private hot spring, Koharu boldly takes naked selfies with her own camera. Upon arriving at the hotel, drawing an erotic card leads directly to sex. Koharu's sexy expressions during intercourse are vividly captured as she reaches orgasm multiple times. Her desperate craving for the penis and complete transformation into a submissive woman is a must-see.