Beautiful space alien princess Lum invades Earth on her UFO, and unlucky Ataru Moroboshi's world gets turned upside down! Will Lum become Earth's electrifying new leader? Or will Ataru somehow miraculously save Earth from space alien onslaught?

Undeterred by Lum's jealous anger, Ataru continues to shamelessly chase skirts. When the priestess Sakura returns as Tomobiki High School's nurse, the school is plagued by unprecedented menaces that titillate Ataru's lecherous heart! Later, Lum's gorgeous childhood friend Ran escalates the school hijinks, but what Lum doesn't know is that Ran has a major score to settle!