Nanami Momozono is alone and homeless after her dad skips town to evade his gambling debts and the debt collectors kick her out of her apartment. So when a man she's just saved from a dog offers her his home...

Ataru Moroboshi is the unluckiest man alive... and the most lecherous. In a race deciding whether alien oni will take over the Earth, he ends up representing Earth. His opponent? Lum, an oni girl! Despite th...