ROE-219 After being given aphrodisiacs for ten days, my beloved aunt became a helpless fucktoy for me to cum inside whenever I wanted... Tada Yukaka.

To make my beautiful aunt do as I wish, I, a medical student, used my knowledge to create an aphrodisiac. Then this summer, I ended up staying at my aunt's house and the time came to test the aphrodisiac. Stealing glances from my aunt, one drop, two drops, three drops, four drops, I gradually increased the amount. Her body heated up, her breathing became ragged, and she twisted her body; she seemed no longer sane. Then, after 10 days, my aunt, who had finally lost her reason, attacked me. After that, my aunt turned into a docile flesh toilet just for me…