[Watakarashi] Girlfriend who holds her pee

A shy girlfriend in her school uniform tests her resolve in a long, aching game of endurance, knees pressed tight and thighs trembling as an hour and twenty minutes of holding leaves her bladder straining and desperate. Tension builds from a taut, quivering hold past 510ml into helpless shudders, small leaks darkening her panties and a frantic, squatting struggle as her control breaks in warm spurts. Flushed, breathless and utterly exposed, she finally gives way on the floor in a spreading, intimate flood that captures both her embarrassment and her sweet, yielding surrender.