Episode 1 - Dekapai Gimai, Shuurai
His stepsister's overwhelming breasts cause him to lose all sense of reason! Takashi's parents remarried and he ended up living with his stepsister. He thought it would be awkward to live with a girl, even though she was his stepsister, but he was surprised when he saw her. Her name was Alice, a beautiful girl from Northern Europe. While Takashi was happy to have a beautiful stepsister, her overly large breasts made him feel uneasy. However, seeing Alice trying to fit in with the family, Takashi suppressed his wicked feelings and treated her as his stepbrother. However, one day, when he saw Alice naked, Takashi's wall of reason collapsed.

Episode 2 - 7days
Big breasts dancing in the hands of a cheeky younger man. One day, Kotomi returns home to find a strange boy there. When she asks her mother about the situation, she learns that a relative and her husband are going on a trip and she's going to take care of him for a week. His name is Ren, a boy younger than Kotomi. Kotomi is put off by Ren's cheeky manner, who calls her by her first name in a familiar manner. However, things turn out to be different, and Ren ends up staying in Kotomi's room. Remembering a scary TV show she saw at dinner, Ren becomes afraid to sleep alone. Kotomi reluctantly lets Ren into her bed. Once in bed, Ren clings to her. Kotomi senses something akin to Ren, but his hand movements gradually become more erotic. Kotomi tries to reject him, but he massages her big breasts with practiced hands, and before she knows it, she's pleased.

(Source: Getchu, translated)