The plot revolves around the overprotective teacher Seichi Ozaki. He loves to travel and visit remote islands. At the request of the head of the island of Ushiha, commonly known as the Island of Childbearing, Seichi is to take over the burden of the head inseminator. The fact is that for hundreds of years, women on the island have been carrying a fetus in just a week. However, things have been going badly lately, due to the deterioration of the quality of genes among the male population of the island. Actually, our brave hero should help with fertilization.