Anejiru The Animation - Season 1

After a decade apart, Yu Shirakawa moves in with his mother and her new husband. He is welcomed by his three stepsisters, Kyoko, Ryoko, and Anzu Shirakawa. They provide him with a room previously used by their father for archaeological storage. Within this space, Yu discovers a cursed jar. It imposes a condition: he must gather a specific feminine essence, referred to as "love juice," before a deadline. Failure to do so will result in a severe curse taking effect.