Mirai lives happily with her husband and father-in-law. Her father-in-law is kind-hearted and gentle, treating her very well. Mirai's husband loves her dearly, but he suffers from impotence. Knowing that he cannot meet Mirai's needs, her husband decides to order aphrodisiac pills online. However, before he gets a chance to use them, he receives a request for a business trip. If discovered using the aphrodisiac, it would be very embarrassing, so Mirai's husband decides to mix the pills into the tea he usually drinks, then stores it in the fridge. Little did he know, Mirai and her father-in-law accidentally drink it. With their sexual desires long unmet and the added effects of the aphrodisiac, the father-in-law and daughter-in-law completely lose their senses, diving into a search for each other's bodies! But after the drug wears off, Mirai's body can’t forget the feeling of pleasure that her father-in-law provided. When she made love to her husband, she didn't feel anything anymore, now Mirai's body only wanted her father-in-law's cock, wanted to be fucked by him, wanted him to use her sperm to fill her uterus...