[YOSHITORA] Oushima Nairu wa Hentai kamo Shirenai (Ougon no Sonata XXX Sono Juu)

Nairu is a shameless schoolgirl who admits she might be a pervert—home alone, she teases her plump rear and touches herself, but private relief just isn't enough anymore. Craving an audience, she sneaks out at night to relieve her gas and mess in the open air, only for a bald older man to stumble onto her mid-act and catch every mortifying second. Instead of running, the dirty old uncle proposes they partner up, and the two fetishists give in to a filthy outdoor session full of farting, enema sprays and shared taboo pleasure.