When he got the key, he didn't think much of it.
After all, in this era, with the rapid development of technology, many houses had been equipped with intelligent sensors. Such keys had been eliminated decades ago. When he touched the key, he was very surprised, thinking that it might have fallen from a corner of the old house when he was wandering around.
He then put the matter to the back of his mind until a few days later, when he accidentally found the key in his new clothes.
The first time, he thought that he might have accidentally put the key in the pocket of his new clothes. After he found the strange key, he put it in the drawer.
