One night during a casual drinking session at home, the shy girl gradually starts cooperating with increasingly explicit photo shoots, carried away by the alcohol. The guys, encouraged by her compliance, begin making bolder demands. During a relaxed get-together with her plain-looking brother and his confident senior, they start off innocently sharing plain snacks and soft drinks, chatting in high spirits. But taking advantage of the shy girl's low alcohol tolerance, they keep pouring her drinks one after another. What follows is an unexpected turn of events.