First appearance of Tsubame, Sakura's boy friend who has some magic abilities. Sakura invites Ataru, Lum, Shinobu, Megane, Perm, Chibi, and Kakugari to a disco. Things later go haywire as Tsubame starts casting spells and all sorts of weird creatures appear, including Rei.

Kurama takes Ataru back in time to help her father who appears to be afraid of women. Later Ataru and Kurama's father have to get past a guard on a bridge.

Ataru, Lum, Shinobu, Sakura, Megane, Cherry, and others are staying at a beachside resort. During the day, an octopus is stealing peoples swimsuits, but it appears to look like Cherry is doing it. At the end, they find the octopus and beat him up.

Still at the resort, the group meets some maniac who is having an all-you-can-eat contest. Sakura reveals the secret of her figure to be a diet pill called "Beauty Foods". But we really know the real reason is Sakura can just plain eat like a whale, and we see her do so as she beats Ataru and Cherry in the contest and clean the maniac of all his food.

Mendo returns for a formal introduction on his first day at school. He and Ataru have a duel for presidency of the class which ends in a tie. So they have a duel with cannons, which Ataru wins with help from Lum.

Lum's computer tells her that Mendo is really the best choice for her lover, so she brings a set of constellation scales to school and weight Ataru versus Mendo in a series of test in the scales. At the end, the scales break and we see the class as constellations.

First appearance of Benten, Lum's best friend the goddess. Lum takes Ataru to another planet to help in a battle against Benten's family. The battle consists of catching stones in bowls on a giant set of scales. Ataru starts playing with Benten and ends up messing up the entire game.

Match Benten and her girl biker friends come to Earth for another round of fun. Ataru sides up with Benten again, and Lum recruits Jariten and some people dressed as demons.

Ataru and Kuribayashi are enemies from the very start. Then Lum shows up and Kuribayashi falls in love. Finally Lum goes out with Kuribayashi in hopes on lightening his spirits.

On a day when students mothers come to school, Mrs. Mendo and Lum's mother get into a dispute and Mrs. Moroboshi acts as judge by setting up a roulette game.

Mendo bring an antique camera to school that sends Ataru off into other worlds. Lum manages to find him through a class room window that had been stuck for years.

Every morning, Ataru goes jogging early to see girls. On the way to school, Ataru breaks the fall of an attempted suicide as he was grabbing for a 100-yen coin below her. Ataru and Mendo get into a dispute over who is more noble and end up playing a game of tennis.

First appearance of Ran, Lum's childhood friend. During a small celebration at the Moroboshi house, a little doll enchants Ataru to follow it to Ran. Ran tries to kiss Ataru to drain his youth, but Lum shows up.

Ran invites Lum, Ataru, and Ten over for cookies and tea, but her real plot is to suck Ataru's youth. Ran makes a double of Ataru and tries switching them, but she gets confused and loses the real Ataru.

Lum acquire's Ataru's diary that has written in events that will happen throughout the day. Ataru tries to use it to his advantage, but the records in the diary are not quite how they first read; making use of puns or ambiguous statements.

Mendo finds an alien child in his locker and goes through great lengths to hide it from everyone. Later after everyone has found out, a whole mob of these alien children arrive, just for Mendo.

During math class, Kuribayashi and all the students fall asleep, save for Ataru and Mendo. Lum arrives and finds out that a tiny old man and girl are responsible for this magic. The tiny girl then uses some more magic to have a party with Lum, Ataru, and Mendo; until the principal arrives with some parents.

Lum, Mendo, Shinobu, Ran, Ten, Sakura, and Cherry all are in a blossom orchard for some traditional reason. Ataru is in the blossom orchard for a picnic. Cherry's chanting summons some sort of woman spirit, whom Ataru runs off and meets with a giant.

Ataru eats a lollipop Lum gave him and gets a mouth burn. Running off, he finds Cherry and a weird melon, which Ataru eats to cool his mouth. The melon causes Ataru to split into two Ataru's, one polite and the other casual. The two continue to fight all day.

Sleeping in class, Ataru has weird dreams which he relates a little of as he occasionally talks in his sleep. Annoyed, his classmates wake him and a dream demon comes out from Ataru's sleep.

Lum returns to her home planet unaware that her father is throwing her a matchmaking party. Ataru (who knows about the party) and Ten follow her.

Lum returns to her home planet unaware that her father is throwing her a matchmaking party. Ataru (who knows about the party) and Ten follow her.

On a class field trip, Ataru journeys to an underwater kingdom; and Ataru, Lum, Shinobu and Mendou get lost in a cave (exposing Mendou's legendary fear of the dark).

On a class field trip, Ataru journeys to an underwater kingdom; and Ataru, Lum, Shinobu and Mendou get lost in a cave (exposing Mendou's legendary fear of the dark).

Ataru and Ten switch bodies after wearing some kind of special earmuffs.