Urusei Yatsura : Season 1

Kotatsu-neko is introduced.

Ataru helps a wounded bird who transforms itself into a raccoon and moves in to repay the service to Ataru.

Ataru finds the perfect part-time job - a washing attendant at a bathhouse - which he excitedly anticipates as being an opportunity to ogle and grope naked women. However, it doesn't turn out the way he expected.

When Lum plans the class's end-of-year party, Ataru explains that New Year's is when you forget who you are. He's a bit worried she took it a bit literally...

The normal cast is again put into an ancient Japanese story with Ataru as a food thief with Onsen-Mark and Cherry as his occasional companions.

After he's pelted by snowballs by Ataru and his friends, an annoyed Ten plans revenge on Ataru during class after Onsen-Mark threatens the class should any of them make noise.

Lum's mother boots father out of the house, so he comes to stay with Lum.

Lum gets Ataru to go on a ski trip with her, but Mendo, Shinobu, and Lum's guards find out and tail along to cause static, Ataru enters a ski contest.

Ten becomes the new Ataru when he mistakenly gets another girl to marry him, but tries to escape so he could see other older women.

Ten orders two special balls called Love-Love Catchballs that supposedly show a person's future love, one for each gender. When Ataru finds the one for guys that show their future wives, things quickly get chaotic.

Ryoko plans a masquerade "party" (which is actually a tournament of sorts) to get closer to Ataru, but her brother Shutaro is dead-fast against this, hiring all of Ataru's rivals to fight him.

Lum catches a cold from her father, which soon spreads across the entire male student body at Tomobiki High.

After their beach shop is ruined by their fighting due to Ataru and co.'s interference, a father and his "son" Ryunosuke move into Tomobiki High and set up a shop in-school.

Ataru talks to Megane one day about handing over a "position", which Shinobu overhears, thinking that he's planning to give up on Lum. Not wanting to lose Mendou, she takes manners into her own hands..

Admiring Ran's feminine beauty, Ryunosuke goes out with her in an attempt to become more feminine, but everyone else except Ran (who doesn't know Ryunosuke's true gender and thinks she's going on a date with a guy) thinks this means she's interested in girls when she claims she has no interest in boys. Lum and Ataru decide to intervene with Ran and Ryunosuke's "date".

When Ataru flips out over Lum for forgetting his upcoming birthday, she goes absent from school for days and only comes home late at night. This causes both Ataru and Lum to become upset, as well as separately confine in Miss Sakura.

After enduring Lum's ultra-spicy dinner on a camping trip, Ataru, Mendou, Megane, and Perm head off to find food (with Lum and Ten not far behind). They eventually end up fighting against the Evil Peach after they're tipped off by Cherry of a village that produces giant peaches, wanting to save a beautiful girl from being sacrificed.

Ataru is changed into a girl by Kurama's tengu henchmen after they try to use a cannon to change Ryunosuke into a man for their princess. NOTE: There is no appearance of Shinobu in this episode.

After Ataru, Ten, and Mendo fall for a beautiful woman's love letters - which end up luring them (along with Lum and Shinobu) to the inn she works in - they stay at a creepy inn, where the residents quite literally want them for dinner.

Mendo's rival Tobimaro Mizunokoji returns, and the two decide to settle their baseball rivalry once and for all.

Shinobu gets involved with the rich Kobayakawa family's youngest son, the adopted Makoto, whose father recently died. But his older siblings want to bump him off so that they don't have to share their late father's wealth with him.

Ataru is the producer/director of a film for school. At first it only involves him, Lum, and the Stormtroopers, but it soon involves most of the student body after Ataru gets funding by Mendo.

Ataru and Lum are left home alone when his parents leave for three days, and Lum locks Ataru inside of his own house! When a botched-up meal causes planes and tanks to appear instead of food, it attracts the attention of Sakura and Sakuranbo, who try to fight them off..but end up fighting against each other's summoned creatures instead!

Onsen-Mark tells the class a story of a cursed willow tree, which Ataru finds a load of fluff and ends up releasing an old man after Mendou after he carved his company's symbol with a knife on said tree. The old man drops a map to a possible treasure, while Mendou plans to see him at midnight to settle a score regarding the mockery of his company logo Ataru carved on the back of his robe. Meanwhile, Onsen-Mark is forced to do guard duty across the school by himself at night.

Ataru, Lum, Shinobu, Mendo, Onsen-Mark, Sakura, Cherry, and the Stormtroopers have a stay at a mansion, where they are slowly picked off one by one in a manner similar to the nursery rhyme Cock Robin.