The popular sister has many friends, and they are all cute girls! I prepared a drink laced with "aphrodisiac that works on any girl" for the girls coming to my sister's birthday party. As a result, my sister's friends, who used to think I was disgusting, started chasing after my dick, putting me in a harem situation! Having tasted the sweetness of it, I kept giving the aphrodisiac to the girls who came to visit my sister, and it turned out that even my sister had drunk the aphrodisiac…
