Julia and Kenichi have been married for half a year. Recently, her father-in-law's house was seriously damaged, so he had to temporarily stay at their house for a while. Her father-in-law is a very kind person but is always polite to her and her husband, which makes her feel extremely inconvenient. Her life is extremely happy, except that her husband always neglects their sex life. Because of work pressure, Kenichi always has to wake up early and constantly have to go on long business trips, so he is always tired and has no interest in sex. Once I read an advertisement for an aphrodisiac that can increase sexual desire regardless of circumstances. Kenichi immediately ordered it and planned to use it after his upcoming business trip to compensate his wife for all the time she had to endure. He mixed the medicine into tea and put it in the refrigerator. The next day, Kenichi went on a business trip. Julia saw a bottle of tea in the cupboard. She thought Kenichi had received it from someone, so she invited her father-in-law to try it. And under the effect of aphrodisiacs, their reason gradually faded away and was replaced by sexual desire. The two rushed into each other, the whole house was filled with lewd sounds. This was Julia's best sex ever. Even though the effects of the medicine were gone, she could never forget the feeling of joy when her father-in-law slammed his giant, hard cock inside her. Therefore, every time her husband is not present, she secretly goes to her father-in-law and asks him to appease the love-hungry demon that is growing stronger inside her...