Ever since a cosmic phone call brought Belldandy, Urd, and Skuld-a trio of literal young goddesses-to live in college student Keiichi's residence, his personal life has been turned upside down, sideways, and sometimes even into strange dimensions!
No sooner has Urd's mother left, than Keiichi and Megumi's father shows up! But whatever you do, don't call him that. It's just "Keima-san." Try to show him respect by saying "Father," and he'll smack you upside the head. You see, he simply wants to be treated as an individual. Also, if you're a woman, don't approach any closer than one meter to Keima-san-because he'll run away. Only his wife is ever permitted that close. Well then, what in the world must Mrs. Morisato be like? Don't call "Mother" that either—because you're about to meet her too!