This is the Business KTV Concubine Selection Chronicles: Fucking While Singing

The story follows a group of young men and women who embark on an unconventional "concubine selection" game during a night at a business KTV. As they sing and interact, they gradually develop various ambiguous and passionate relationships, revealing the desires and choices in urban nightlife. The film, through authentic scenes in the KTV private room, showcases the psychological games and physical encounters between characters, brimming with dramatic tension and sensory stimulation.