Ep. 21: Grandparents' Journey, Toritsuka's Fast, Romantic Misunderstandings, and Club Smear Campaign

Kusuo attempts to locate his lost grandparents, who encounter Kokomi and Makoto, earning their approval as potential romantic partners. Meanwhile, temple staff enforce a three-day ascetic fast on Reita Toritsuka, prohibiting food, video games, and pornography. Reita requests Saiki K. to smuggle these items, but Saiki intends to use the opportunity to reform his friend's habits. On Valentine's Day, Chiyo prepares homemade chocolate and a love note for Shun, but Nendo consumes the sweets. Shun reads the note, initially assuming it belongs to another student, before interpreting it as a secret message from Chiyo proposing a sworn friendship. He miscommunicates this to Chiyo, leading her to believe they are a couple. Concurrently, the Newspaper Club attempts to damage Kokomi's reputation by orchestrating an incident where she is splashed by a puddle.
Episodes
- Ep. 17 · Kusuo faces puzzles, visits the zoo, observes his father, and deals with family and friendship dynamics.
- Ep. 18 · Touma Akechi's talkative arrival, potato harvest mishap, mascot cat incident, and Metori Saiko's school resignation
- Ep. 19 · Kusuo and Kokomi organize the PK Academy Cultural Festival play despite Saiko's interference.
- Ep. 20 · Kusuo uses psychics to replace himself while Warp disappoints his father and friends struggle to stay awake for New Year's Eve.
- Ep. 21 · Grandparents' Journey, Toritsuka's Fast, Romantic Misunderstandings, and Club Smear Campaign
- Ep. 22 · Kusuo navigates social complications while Touma investigates his suspected psychic abilities through recent events.
- Ep. 23 · Kusuo confronts his unusual past through multiple time travel attempts to second grade.
- Ep. 24 · The Perfect Pretty Girl Trial / Investigate, Psykickers! / Disaster Returns After the Break / Recalling the Cast, Parts 1 and 2