After his parents remarried, Takashi ended up living with his step-sister. He thought it would be awkward living with a girl, even though she was his step-sister, but he was surprised when he saw who his step-sister was. Her name was Alice, and she was a beautiful girl from Northern Europe. While Takashi was happy to have a beautiful step-sister, her overly large breasts troubled him. However, seeing Alice trying to fit in with the family, Takashi suppressed his wicked feelings and treated her as his step-brother. However, one day, when he saw Alice naked, Takashi's wall of reason crumbled.