When he returns home, he finds his older sister hosting a girls' night with her friends. Surrounded by teasing, mature girls who poke fun at him, the conversation quickly turns intimate after they start asking if he has a girlfriend or if he's still a virgin. What begins as a casual party soon escalates into a game of King's Game, where the dares grow increasingly sexual and overwhelming for the inexperienced boy. The stimulation becomes too much for the virgin brother, ultimately leading to a shocking outcome—the loss of his virginity with his own sister.