The first-ever anal close-up work in history！！ Based on the information that 'Tsubomi's anus twitches when she feels pleasure,' filming was conducted. With a shameful doggy-style pose fully exposing the vagina & anus, stimulating sensitive areas causes the anal wrinkles to contract continuously！！ As she starts to feel it with a piston-like penis, her entire anus begins to move, and after internal ejaculation, semen drips from her twitching anus that won't stop. Truly, the twitching of the anus was a barometer of ecstasy.
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