I held the keys in my hand, pondering the oddities of the situation.
Suddenly, Sean spoke up. "This key isn't for your front door, is it?"
"How do you know?"
I looked up at him, my gaze tinged with suspicion—did he secretly try using the key to open the door?
"I can tell by the shape of the keyhole. This key is for an X-shaped lock, while your front door has a flat-type lock," he paused, as if recalling something. "In this small town, most houses use the same kind of lock, probably because the local locksmith shops tend to stock that particular model. Although I haven't been here long, I've noticed this trend. This key probably isn't for a regular house in the town."
He continued his analysis. "However, I've seen similar locks on houses in the northwest outskirts. Most of those houses
