[Mitarai] Alone in the karaoke (+smell edit)

A young woman books a private karaoke room for a solo outing, only to learn the bathroom is out of service while she has been desperately holding back for days and her stomach aches. Lifting her warm ass to relieve pressure with a quiet fart quickly turns into an unstoppable, soggy accident that heavily fills her shorts and leaves a conspicuous bulge pressing against her butt as the awful smell spreads through the tight room. Her attempt to keep singing and pretend everything is fine becomes excruciatingly tense when a staff member brings a drink and lingers, forcing her to hide her soiled panties, trembling embarrassment, and lingering odor before she can flee to clean herself.