I am selling this item as I have already completed it. ⚠︎︎Please be sure to read the following precautions and agree to them before purchasing. 【Precautions】 ・All envelopes have been opened with a cutter. The contents have been put back inside the envelopes (some were originally opened by design). ・There are no writings, major stains, tears, or other noticeable stains due to the seller's negligence. ・There are some necessary damaged parts in the process of solving the mystery. Please understand this. ・No individual sales or price reductions. ・The envelope case in the second photo is not included due to its oversized dimensions. (If you are okay with it being folded, please comment before purchasing.) The instructions on how to play the game and other precautions are written on the website accessed by scanning the included QR code, so please read them carefully before playing. If you have any other questions, please ask in the comments. 【Product Description】 A dozen or so pieces of mail left behind by a missing resident in their room. That room is a room in a certain apartment in the Kinki region, "Room 503". By unraveling the remaining mail, various circumstances, incidents, and the resident's intentions are revealed. What exactly happened in this room? ※This work is not by Daiyon Kyoukai (Fourth Boundary), but by 4x4sect. (a joint brand of Nippon Television and Daiyon Kyoukai). This is a mystery game where you investigate the actual mail you purchased to uncover the secrets hidden in Room 503. You will unravel the contents of over 10 types of mail and various websites to get to the truth of a certain incident. 4x4 sect. Daiyon Kyoukai (Fourth Boundary) About a place in the Kinki region ARG Mystery Solving