A boy mad scientist isn't mad in a bad way. He knows the girl he wants is above his social status, so he develops a way to make her not care about money or status and choose him.
Young Haruko wanders into her brother's room in the nocturnal hours and uses her brother's hard dick to take away her boredom. She is confronted by a spirit-girl in his closet who considers his dick her personal property. Haruko looks for a way to solve her problem.
When he was born his Older Sister took charge of him from their Mother like he was her own personal Barbie Doll. Her love for him lasted throughout their years in school and later in life. They moved in together and she makes love with her Brother with a big surprise.
In a futuristic 1990, a lab decides to make a robot that has a male penis, that is expandable in length and girth, and a female robot that is made for pleasure only