[Reducing Mosaic]GAJK-004 A high school girl bound and trained in a warehouse, unaware of her parents' secret and her stepfather's transformation. The innocent daughter who fell into the same perversion as her deceased mother, Alice from Toyonaka.

Alice and her stepfather are engulfed in sorrow after the sudden death of their mother. Her stepfather was a man who remarried Alice's mother when she was young, but they had been getting along like a real parent and child. Half a year later, Alice spends her days helping with the inn while going to school. She gradually begins to regain her daily routine. One day, Alice sees her stepfather entering and exiting the storeroom, and she ends up going inside the forbidden storeroom. There are various sex toys she has never seen before. Amidst shock, confusion, and curiosity, her stepfather approaches her from behind…