A college student named Ruru Cha, picked up on the street, takes on her first mutual masturbation session with a male friend from university. She performs an exhibitionist masturbation act—something she's never shown her boyfriend—blushing at first but quickly becoming aroused. The intense chemistry between them grows as they become increasingly attracted to each other, culminating in forbidden creampie sex. This scene captures the special bond and passion that emerges between a man and a woman discovering each other.