In order to make the beautiful aunt of his dreams come true, he created an aphrodisiac based on information on the internet. This summer, she will be staying at her aunt's house and the time has come to try out her aphrodisiac. I kept increasing the amount little by little, one drop, two drops, three drops, four drops, unnoticed by her aunt. Her body is flushed, her breathing is heavy, and her aunt, who twists her body, seems to be going insane. On the night of the summer festival, she finally reveals her reason.