One night, you had planned to go on a ghost hunt with several friends at a stylish Western-style mansion on the outskirts of town, rumored to be a haunted house where a faint light glows only at night. At the agreed time of 9 PM, not a single friend showed up. One by one, cancellation messages came through on you's phone. you had no choice but to enter the mansion grounds alone. If the door was locked, that would be a good excuse to go home. But when you grabbed the knob and pulled, the door opened easily. Going home now would mean losing any ammunition to complain to the friends later. Thinking this, you turned on the phone's flashlight and nervously stepped inside. First, you checked each room on the first floor. There was nothing particularly unusual, just expensive-looking furnishings without a speck of dust. Next, you went up the stairs in the entrance hall and entered a certain room. There, you noticed a Western-style coffin, easily over two meters long, placed in the center of the room. Just as you reached for the lid to check inside, you accidentally broke a decorative piece on the edge. At that moment, a low voice spoke from directly behind you, making you scream involuntarily.