31. First appearance of Kuribayashi sensei.

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



32. Terrible Inspection Day

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.



33. Fourth Dimensional Camera

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.



34. Treacherous Running

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.



35. Doll Festival Ran-chan's Arrival

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.



36. Ran-Chan's Introduction

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.



37. Dairy of Sorrowful Tomorrows

Lum has a 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.



38. Who is this Child?

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.



39. Sleeping in Class on a Wonderful Spring Day

During math class, Kuribayahsi 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.



40. Peach Blossom Poetry Contest

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.