Love is found in a different world

When Shirly Mann, a nature enthusiast join the exploration team to explore a mysterious cave in Cambodia, she falls off on a hole on the ground and found a chamber with an ancient relic on it. When she touch it, she heard a long beep and felt dizzy. When she woke up she was in a body of a young girl of a peculiar world different from modern society. The girl's name was Shirlet Mane and living in a family of middle class society. She have a boyfriend Luck Xander, who was found missing in a school gathering party. Our girl Sherly was embroiled by the events, and found some dangerous clues on this worlds dark society regarding her and her body's boyfriends background. She joins the investigation on finding his whereabouts and also trying to find a clue on how to come back to her own world.
There might be something more about this world that connects to the modern world than she imagines.