Yu lives with his three sisters-in-law while burdened by a mysterious artifact known as the Vial of Inanna. To lift a curse and grant a wish, Yu must secretly collect female body fluids from unsuspecting women. Using the vial's supernatural signals and effects, he begins a daring quest to gather "juices" from Kyohko and Ryohko, leading to a series of provocative encounters.
To break a mysterious curse tied to the Inanna tube, Yu must collect sexual fluids from his sisters. What begins as a private encounter with Anzu quickly escalates into a group experience involving Ryoko, Kyoko, and Kuri. Once the curse is finally lifted, Yu realizes that his sisters' true wish may be to maintain this intimate bond with him forever.