One day, Taro falls in love with a girl. Her name is Shiro and she lives in a big house. There also live four sisters. Taro often visits the house to meet Shiro at first, but the sisters propose to him he should live in the house. Like this, he starts living at their house, but what he experiences there is.... Another fantasy causes a whirl of spiral.... Are you happy now...? [From ErogeShop]

The story begins with a boy who wakes up in a room in an old mansion, unable to remember his name or how he got there. He is greeted by a beautiful woman in a black dress who tells him she picked him up and offers him a place to stay. The boy feels relieved to have someone who cares about him and agrees to stay. As he spends time in the mansion, he experiences various pleasures, including being dominated by the woman, and learns to embrace his existence.