Maria, soon to be married, visits her fiancé's parents' house for New Year's, partly to greet the family. Playing the dutiful bride-to-be, she throws herself into helping with chores, keeping a sweet demeanor the whole time... But her father-in-law, a former pharmacist, sets his sights on her, and even with her fiancé nearby, secretly rubs a powerful custom-blended aphrodisiac onto her pussy under the kotatsu... She tries to resist, but her juices keep slowly dripping out. Unable to fight the technique of her father-in-law's fingers, her most sensitive spot burning hotter than the kotatsu itself, she cums over and over. From then on — under the kotatsu, in the closet, even secretly at night right beside her husband-to-be — she drowns in her father-in-law's aphrodisiac-laced fingering... ‘I don't just want your fingers... I want your cock, Father...’ In the end, the three-day New Year's holiday turns into a sweaty, soaking-wet fuckfest.