Beautiful space alien princess Lum invades Earth in her UFO, and unlucky Ataru Moroboshi's world gets turned upside down! What unimaginable shenanigans will Lum bring to Ataru's life? One thing's for sure--nearly every moment is electrifying with her around!

Disaster-prone Ataru isn't the least bit interested when he stumbles upon a family insult match on the beach, but everything changes when Ataru finds out that one of the combatants is actually a teen girl! Later, a nervous fire-breathing Ten meets his pyro-hating mother, which presents the perfect opportunity for Ataru to mess with his young nemesis!