GAJK-004 A schoolgirl is trained in bondage in a storehouse, her parents' secrets she didn't know about, and her father-in-law suddenly changed. - Alice Toyonaka, an innocent daughter who fell into the same sexual tendencies as her late mother.

Alice and her stepfather are saddened by the sudden death of their mother. - Alice's stepfather was a man who remarried her mother when she was young, but they got along like real parents and children. - Six months later, Alice takes over from her mother and spends her days helping out at the inn and going to school. - Gradually, life began to return to normal. - One day, Alice sees her father-in-law going in and out of the storehouse and enters the storehouse, which was forbidden to her. - There are many erotic tools that I see for the first time. - Amidst a mixture of surprise, confusion, and curiosity, my father-in-law approaches me from behind...