Sanae Tanemaki's "Penis Laboratory" ~ A Story About a Futanari Science Student Who Performs an Aphrodisiac Fueled Sex Experiment on Her Friend's Pussy~

Sanae Tanemaki's "Penis Laboratory" ~ A Story About a Futanari Science Student Who Performs an Aphrodisiac Fueled Sex Experiment on Her Friend's Pussy~ cover

[ほたほーむ (ほたる)] 種巻早苗の『ちんぽ研究室』～ふたなり理系女子大生が友達♀まんこでキメセク実験する話～