Ep. 66: Happy Birthday My Darling
Ipinalabas noong Abril 20, 1983

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. (Source: Wikipedia)
Mga Episode
- Ep. 62 · Space Cold Panic!
- Ep. 63 · Ryunosuke Arrives! I Love the Sea!
- Ep. 64 · Goodbye Season
- Ep. 65 · Ran-chan's Great Date Plan!
- Ep. 66 · Happy Birthday My Darling
- Ep. 67 · Seeing Togenkyo as a Hell Camp!
- Ep. 68 · The Muco Flower's Name is Ryunosuke
- Ep. 69 · Bottled Letter Seashore Mystery!
- Ep. 70 · Dramatic Appearance! Mizunokoji Ton-chan!!