Keiichi's got a new house far from his meddling ex-dormmates, and he's living with a beautiful goddess who is bound to him by an order from The Almighty. But Belldandy is surely beyond the reach of a geek like Keiichi, or so he thinks... at least until Belldandy's voluptuous older sister Urd arrives. Irritated by the lack of "progress" in Keiichi and Belldandy's relationship, Urd wants to teach him a thing or two about seduction, but Belldandy is pretty ticked off by her sister's "hands-on" technique!