Yusaku is heading home for the first time in eight years. He is a medical student about to take on a summer internship in the country working at his uncle's clinic. While on the train, he becomes smitten with a young woman sitting across from him, but is unable to summon the courage to speak to her. When he arrives in his hometown, he is reunited with friends from his childhood, and get introduced to gorgeous nurses, patients, and mysterious young girls. It is only a matter of time before Yusaku runs into the beautiful woman he saw on the train. (Source: AniDB)

Goddess of war, Valkeries, are fierce in battle and can't be beaten by anyone in the world. But they have the defect of being attracted to normal male humans, that's what the inhabitants of the overworld noticed and decided to use to their advantage. Not only to win battles, but to take some Valkeries under their control turning them into sex slaves, ones just lose themselves and become soulless sex slaves but others deny to lose their pride and keep fighting almost every time, with words. Freiya was captured and the devils can now see where exactly is each goddess which is leading to disaster. (Source: ANN)

Saeki Nozomi is a nurse that works at the hospital where her cousin is stay at due to a illness. At this time in the story, she is married but by herself while her husband is on business trip. She is also a bit horny as her period is coming up but tries to be faith to her husband and only flirts with her cousin whom she considers as her little brother. - Yumi is the guy's sister who also works at the hospital as a trainee since she is studying to be a nurse as well. She has strong feelings for her brother and worries about him a lot but doesn't cross that line... (Source: ANN)

The main character, Tatsuya Tagami, has an ambition of World Conquest, and the first step of his plan is to make every female classmate pregnant. Unfortunately, his dream is rather impossible in his all-boys school. Hence, he transfers himself to the newly reorganized Hakuka Co-Ed Academy, which was previously an all-girls school. (Source: ANN)