[PiT (Natsuki Shuri)] An Incident Is Coming This Way・Part 2 (Touhou Project) [Black Grimoires]

Patchouli Knowledge throws down a brazen challenge to Marisa Kirisame: a duel where the wager is nothing less than their own bodies. When the studious magician reveals a strap-on and teasingly coaxes her flustered witch friend into servicing it, Marisa's indignant protests give way to trembling, gasping surrender as Patchouli eagerly claims her first time. What starts as a petty rivalry between two stubborn girls spirals into a shamelessly thorough lesson in who really holds the upper hand.