Urusei Yatsura

Ataru Moroboshi, an unlovely flirtatious boy, has been chosen to fight an invading alien force's champion in a 10-day game of tag. If he loses the aliens will invade Earth, but if he wins, the aliens will go home. Ataru isn't at all willing to play tag until he sees the alien's champion: the beautiful Lum. A group of admirers of Lum try to summon her UFO back to Earth, using Ataru as bait, but instead they get an intergalactic taxi that takes them though subspace, and the fare for the taxi is the value of all the oil on the planet.

A peach falls from the sky, in which Lum's cousin, Ten comes out for a visit. He is capable of breathing fire and is an instant enemy to Ataru. Ten feeds alien candy to a swallow, making it grow massively in size such that it looks like a penguin. Its appearance in school is just the start of a full day of panic.

Shinobu meets upon Rei, Lum's handsome ex-fiancé, and brings him to Ataru’s house, much to the dismay of Lum. Ataru and his friends find Rei in a restaurant. His poor Japanese being mocked makes him go wild, and as he chases the boys and Lum throughout town, the chaos grows on.

Lum and Ten meet a vicious little boy on top of a flying bear, whom Ataru and Shinobu identify as Kintarō, who came from the sky and is lost. Kintarō's nanny, with Ataru's help, takes the alien children on a tour of Earth and end up in a preschool where the actual Kintarō learns the myth of the real Kintarō and thus hopes to be a role-model to the kids.

Ataru runs away from home, unable to stand the pressure of living with Lum, and bumps into a beautiful lady named Sakura, who takes him to her shrine for exorcism. Sakura becomes Tomobiki High School’s nurse, and her beauty makes all the boys deliberately injure themselves in order to go see her. But later, they get really sick, which might be connected to Ataru, who oddly enough wants to avoid her.

Lum constantly interferes with Ataru's attempts to reach Shinobu by phone. By barging into their phone conversation from her UFO, it inadvertently creates a black hole that causes aircraft to vanish. Ataru puts two mirrors together on Friday the 13th and accidentally makes a little demon appear from another dimension.