One hot summer day, Naoto Kamino finally musters up the courage to reveal his true feelings for his crush, Manabe Rika. Unfortunately, at the same moment, a young boy named Asumo appears (though he refers to himself as the devil). He plots to kidnap Rika and will stop at nothing to obtain her - but Rika has a little secret of her own, she can transform and obtain magical powers during sex...

Distol, a prince of Asteria, had passed humiliating days as a hostage in the neighboring country Bartrage, for 8 years. His mother had been also sent to the country, but she ended up dying. Since then, he made efforts to learn fencing and acquiring the knowledge and cultures in order to protect important himself. However, one day, he knew that his sister-in-law whom he had left in his country was elected as a "Holy Lady" in order to seal Satan. Holy Lady would devote her life to seal Satan. Because he couldn't save his loving sister, he felt his weakness. Then a beautiful girl in black clothes appeared in front of him, and she said she was a witch. In exchange for a strong magic to save his sister, she imposed two conditions on him. They were that he would invade Bartrage to get the secret treasure of the royal family, and that he would kidnap Princess Irina. (Source: AniDB)

Sakuraba Kotaro succeeded to a little grocery store from his dead father. With help of Nagisha, his mother-in-law, and Nagisa, his sister, he managed to keep the store. One day, a big supermarket, Kaneyu, urged him to deliver the shop. The man in charge of Kaneyu was his brother who had run away from home giving up his father's business. (Source: AnimeNfo)

Namamura Akitoshi is a college student who looks weak. He confesses his love to his girl friend, but she refused him saying he looks weak. He makes up his mind to do construction job to become strong. However, all the people he meets there are strange women. As an entrance examination, the manager forces him to make love with her. (Source: AnimeNfo)