Moroboshi Ataru is possibly the most unfaithful, unlucky and lecherous idiot to have ever been born, but for some reason Lum, a tigerskin-bikini clad alien package of sex appeal, jealousy and electricity has fallen for him.

The misadventures of these two stubborn teenagers are spiced up by a veritable entourage of eccentric characters. Among these characters is Shuutarou the richest boy on the planet, Shinobu a superhuman schoolgirl, Ten a fire-breathing baby, Sakura a powerful and very beautiful priestess/school nurse, Ran a cute and psychotic alien vixen with a split personality, a gender-bending martial artist, Benten an alien biker chick, Oyuki the ice queen of Neptune, Cherry a deranged monk, a giant ghost cat and many other lunatic personalities; aliens, humans and non-humans alike interact in endless hysteria in a town named Tomobiki.

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Side story: Urusei Yatsura: Only You
Side story: Urusei Yatsura 2: Beautiful Dreamer
Side story: Urusei Yatsura 3: Remember My Love
Side story: Urusei Yatsura 4: Lum the Forever
Sequel: Urusei Yatsura: Kanketsuhen
Side story: Urusei Yatsura (1985)
Side story: Urusei Yatsura: The Shougaibutsu Suieitaikai
Other: It's a Rumic World: 50th Anniversary Weekly-Shonen Sunday
Alternative version: Urusei Yatsura (2022)