rumor about the old school staircase where students say the number of steps sometimes becomes 13 instead of the normal count. Because of this strange story, many people believe the staircase is cursed or connected to something supernatural. Kanna becomes curious about the rumor and brings it up to Chuzenji-sensei. As the mystery is investigated, Chuzenji analyzes the situation logically and explains the real reason behind the strange staircase phenomenon, showing once again that the scary rumor comes from misunderstanding rather than an actual supernatural event.

Episode Context

The season finale puts Kanna Kusakabe front and center as a paranormal investigator in her own right, with the episode title itself signaling her elevated role. After a lighter penultimate episode focused on autumn festivities, this closer pivots back to the supernatural mystery roots that define the series. Expect a deliberate, suspenseful pace as Kanna and Akihiko Chuuzenji work through one final case together, with Chuuzenji's trademark rationalism cutting through the eerie unknown. The tone balances atmospheric tension with the warm partnership dynamic that has developed across twelve episodes. As a capstone rather than a cliffhanger-driven finale, the episode prioritizes character resolution and thematic reinforcement over shock value. Fans who have enjoyed the measured, intellectual approach to the supernatural will find a satisfying sendoff here.

Runtime23 min

Filler StatusCanon

Plot ImportanceHIGH

Air DateJun 23, 2025

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