Today is my wife Minami's wedding anniversary. After attending the class reunion together, I was planning to celebrate the anniversary at home, but I gave priority to a drinking party with a business partner, and I couldn't speak to Minami from the morning. And I went to a drinking party on the night that Minami went to the reunion, and I came home earlier. When I contacted the members who were attending the reunion, I heard that Sato and Minami Chidori had disappeared before the after party, and my anxiety reached its peak...