In a mischievous dare, a group of Japanese frat twinks trick their straight friend, Lee, into participating in a "briefs prank." Unaware of the twist, Lee eagerly joins in, stripping down to his underwear. The twinks, excited and aroused, surround him, their own briefs tenting with lust. The game begins, and Lee's innocence is no match for the twinks' experienced gay advances. The room fills with moans and the scent of precum as the straight guy's first gay experience unfolds.