Both have similar stories beginning when an alien girl suddenly drops in on a normal High School boy. In To Love-Ru it was the alien princess Lala and in Asobi ni Iku yo! it ended up being the cat girl Elis. Both shows feature an eclectic cast of females all trying to make the lovable loser their own. Same ecchi comedy and both are easy watches since neither of them build up a complex plot of any kind.
Ten years ago, Senpeita Kobayashi fell in love with the girl of his dreams; she left his life, but promised that in ten years she’d see him again and become his bride. Fast forward to the present, and Senpeita is a typical student attending Akebono Academy. That is, until the wide-eyed tiny robot Kemeko crash lands in his bedroom and proclaims herself to be Senpeita’s new bride! As if things aren’t strange enough, Senpeita soon discovers that inside Kemeko is a beautiful girl – a girl who has an uncanny resemblance to his lost love! All Senpeita wants is to be a normal boy, but now he must keep himself out of the way of flying fists, raging jealousies, and battles between Kemeko and Mishina – a global corporation that has a vested and dangerous interest in Senpeita!
Ataru is one of the most desperate womanizers alive, and a man whose life is about to become complicated. When aliens invade, he discovers he has been chosen at random to be mankind’s defender, and must play a game of tag with the beautiful alien princess Lum to decide the fate of the planet! After chasing her with all of his crafty techniques, Ataru finally wins, but his victory also means he must marry the princess herself! Now, with strange alien visitors and a jealous wife to handle, Ataru still manages to keep an eye on his ultimate goal: having his own harem!