Ah Lone Teacher!: A new teacher, Sanjuro Kuribayashi, arrives at Tomobiki High and has been tasked with bringing order to Ataru's class, only to develop an infatuation towards Lum (and a resultant dislike of Ataru's relationship with her).
Terrifying Visiting Day: During parents' visiting day, a misunderstanding between Mrs. Mendo and Lum's mother Mrs. Invader rapidly escalates into potential warfare, which Ataru's mother is tasked with settling.