Anejiru ~Shirakawa San Shimai ni Omakase~

Yuu Shirakawa moves in to his stepfathers house and starts to live with three step-sisters. One day he finds a magic bottle and falls victim to a terrible curse. The only way to break the curse is to fill the bottle with love juice. Living together with beautiful girls while trying to break the curse starts an erotic turn of events in his life.

[Edited from ErogeShop]