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, then 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!