Aspiring scenario writer Yeon-hee uses the nickname Pink Band to write R-rated scenarios. She's famous for her far-out work. Her ideas come from her best friend Joo-yeong's sex experience. However, Yeon-hee herself is a virgin, so she dreams of a romantic and ecstatic first sex that is unlike her scenarios.

Joon-goo is an innocent man in his 30s. He quit his job and runs a small BBQ place with his young and sexy wife, Mi-ri. Then one day, Mi-ri's sister, Na-ri, comes to their house. Na-ri is in her mid-20s. Joon-goo feels attracted to Na-ri who is calm and considerate, unlike minx Mi-ri. The two end up crossing the line after a small happening...