Kotoko came up with three solutions, but they all got shot down. Kuro keeps trying to grasp the future where they can defeat Steel Lady Nanase, but Rikka made it disappear once again. But Kotoko wasn’t done yet. Steel Lady Nanase is not a ghost. What is Kotoko’s 4th solution that may finally put an end to Steel Lady Nanase’s existence once and for all?

Eleven years ago, Muroi Masayuki's life was saved by a Yuki-Onna up in the snowy mountains. Betrayed by his friends and his wife, he ended up anti-social and unable to trust anyone and eventually moved to the town at the base of the mountains where he met the Yuki-Onna. As he was wandering around town, he coincidentally runs into a woman who looks just like the Yuki-Onna...?!

Kotoko presents the case's resolution to an astonished Yuki-Onna and Masayuki, and makes an important decision about their future.

Tae is an active octogenarian who lives with an unusually talkative cat. Why do the fishermen in her seaside town find dead fish coming in with the tide every morning?

A hotel chain magnate asks Kotoko for help in solving a murder… that he may have committed.

Rion talks to her father and, realizing something important about her grandmother, proposes an answer to the president's assignment to her relatives.