[Okayusan] Seishi Kansatsu (School Caste)

Koshimizu needs a fresh specimen for her sperm observation assignment, and bespectacled lab partner Higashiyama is the only donor on hand—except he refuses to perform for free. His price is steep for the busty girl: her huge, soft breasts bared for his hands, her drooling mouth working him in a sweaty sixty-nine, and her pantyhose peeled down so he can pound her dripping wet pussy across the lab. When the sample finally erupts with overwhelming force it splatters everywhere but the petri dish, leaving a glazed Koshimizu cheerfully demanding a do-over while Higashiyama flees her fury.