To fulfill the Yuki-Onna's request of saving Masayuki, Kotoko pulls out all the stops to teach the misanthrope a lesson he'll value forever. The case's conclusion allows Kotoko and Kurô to return to their routines, but memories of Rikka upset their daily calm. The Goddess of Wisdom reminisces of the time she and Rikka collaborated on a murder mystery, one involving a perpetrator who wanted to ensure his crime was seen...