In this story, the government has set up “The Fertility Club” to encourage high school students to have babies to fight the low birthrate problem. The mc is just ordinary guy. But was chosen to impregnate to gyaru girls, Umi and Aika, two of his classmate, to be his partner. Umi was a beautiful girl who loved to wear make-up and accessories. Her appareance is reflects a schoolgirl gyaru. Aika was stunning with body measurement of B103W60H88. She’s very kind woman and known of mature personality, she acts acts like an older sister to everyone in the school. The protagonist suddenly found himself in a harem-like scenario with the two beautiful gyaru girls, he’s filled with extreme excitement, eager to fulfill his duty as a potential father and explore his sexual desires.