Drinking aphrodisiac by mistake, daughter-in-law crazily "attacks" father-in-law

Mirai lives happily with her husband and father-in-law. Her father-in-law is kind, gentle, and treats her well. Mirai's husband loves her dearly, but he suffers from erectile dysfunction. Knowing that he cannot satisfy Mirai, her husband decides to buy aphrodisiac drugs online. However, before he could use them, he received a work assignment. Afraid of being caught using the aphrodisiac drugs, Mirai's husband decides to mix them into the type of tea he often drinks and keep it in the refrigerator.

Unexpectedly, Mirai and her father-in-law accidentally drank it. Longing for sexual desire that has not been fulfilled for a long time, now enhanced by the effects of the aphrodisiac drugs, Mirai's father-in-law and daughter-in-law completely lose their minds and engage in a physical relationship. But even after the drugs wear off, Mirai's body cannot forget the pleasure that her father-in-law brought. When making love with her husband, she feels nothing anymore. Now, Mirai's body only desires her father-in-law's penis, wanting him to penetrate her, wanting him to fill her womb with his semen...