I've seen this a long time ago, it's a funny anime actually, really. If you haven't seen it yet you should definitely give this a watch. And not just because of the obvious reasons :P
From Wikipedia: The story is centered on Natsumi, a young student from Japan who gains the powers of Mii, the well-endowed fertility goddess of a tribal culture. Natsumi and her friends must save the Earth from ultimate destruction by a "god of ruin".