Intro of Main Characters

Jin got a job as a baby sitter to two little boys. The moment he entered the large mansion of the Jeon's at the edge of the forest he felt something dark and heavy in the atmosphere. He even felt more strange when Mr. and Mrs. Jeon kept on giving him pitying looks, and...was that fear in their eyes? His gut is telling him to leave the mansion at once, but, the children looks so sweet and charming. Jungkook and Jimin look like little angels. It doesn't feel right to just abandon them, especially when it seems like their looking forward to having him as their sitter.
He should have followed to his gut.