Today is the wedding anniversary of my wife, Minami. After attending the alumni association together, I was planning to celebrate the anniversary at home, but I gave priority to drinking parties with business partners, and I couldn't even talk to Minami from the morning ... And I went to a drinking party the night Minami went to the reunion, and when I got home earlier, I got ready to celebrate her anniversary and contacted Minami, but there was no sound. When I contacted the members attending the alumni association, I heard that Minami Sato and Chidori had disappeared before the second party, and I was at the peak of my anxiety.