Ep. 66: Ataru's Birthday Dispute Leads to Lum's Absence and Sakura's Involvement
Aired on April 20, 1983

Ataru becomes extremely upset when Lum forgets his upcoming birthday. In response, Lum stops attending school for several days and returns home only late at night. This situation causes both Ataru and Lum to become distressed. Consequently, they separately seek refuge with Miss Sakura, who becomes involved in their conflict. The incident highlights the tension between Ataru's expectations and Lum's actions, leading to emotional strain for both characters as they deal with the fallout of the forgotten celebration and subsequent avoidance.
Episodes
- Ep. 62 · Lum Catches a Cold That Spreads to Tomobiki High Boys
- Ep. 63 · Ryunosuke Arrives and the Father and Son Open a Shop at Tomobiki High
- Ep. 64 · Ataru Discusses Position Handover, Leading Shinobu to Misinterpret His Intentions Regarding Lum
- Ep. 65 · Ran's Ambitious Date Strategy and the Resulting Misunderstandings
- Ep. 66 · Ataru's Birthday Dispute Leads to Lum's Absence and Sakura's Involvement
- Ep. 67 · The group investigates a village plagued by giant peaches and a sacrificial ritual.
- Ep. 68 · Kurama's henchmen transform Ataru into a girl after a failed cannon attempt on Ryunosuke
- Ep. 69 · Mendo, Ataru, and Ten are lured to a creepy inn by a woman's love letters.
- Ep. 70 · Mizunokoji Ton-chan Returns for a Decisive Baseball Showdown