What do you do when a naked princess from outer space suddenly appears in your bathtub? If you're Rito Yuki, the confused teenager who's rub-a-dubbing when the perky Princess Lala of Deviluke splashes down, you inexplicably find yourself engaged to her royal highness' heavenly body, whether you want to marry her or not! Oh, and you're ALSO now heir to the throne of the Planet Deviluke, as well as the target for an endless stream of intergalactic invaders, assassins, rival suitors, and an unbelievably long cosmic chorus line of gorgeous women who are all determined to wormhole their way into Rito's heart and/or bed! And that, needless to say, is probably going to make getting together with the nice Japanese girl who Rito's actually in love with just a wee bit more complicated in TO LOVE RU!