The story of Mr. Araiwa and his family. He is a model employee in a large enterprise, but becomes a completely different character at home. He is very keen on cooking and lets pass no occasion to cook delicious dishes for his wife, who is frequently occupied by her work as a journalist, or his young son. (Source: AniDB)

When Hibio's adventurer mother sets off to research a mysterious tribe, she hits a wall. Fortunately for her, the beautiful young Nima sees a family portrait and decides that she wants her son for her husband and she gets a chance to further her research. She agrees to the arrangement. Of course, she doesn't consult him about his future bride. When Nima shows up in Tokyo to be with her new husband, hilarity and chaos ensues as Hibio and his modern Tokyo background meets Nima's magical heritage.

Haruno Kasumi is a fourth-grader. Her parents are zoologists who went over to Africa to carry out their research studies. In order to see off her parents, Kasumi arrived at Kasumi Town. In the middle of the town lies an enormous mansion surrounded by the forest. The mansion belongs to the Kasumi household, the family in which Kasumi will be lodging in and taken care of. There is a mysterious aura about the mansion and Kasumi discovers a series of talking appliances. The Kasumi family refers to these creatures as "Henamon". In return for living in with the family, Kasumi will be helping out with the household chores such as cooking and washing. Surrounded by various interesting characters, Kasumi begins a new chapter in her life.

Fleeing from his own race, Orgun—an alien being with superhuman abilities and unearthly weapons—travels to Earth to find an answer to his origin. There, he bonds with a young man named Tomoru to defend Earth against the Evoluders, who seek nothing but destruction of other civilizations.