HELP ME FIND OUT THAT MANHWA NAME PLEASE

Hey guys so basically I'm trying to look for this one particular manhwa that I had forgot it's name of. The story is about this purple/black? hair FL who's quite poor and is a scholarship student that happened to go to a school meant for rich kids in place of her ill twin sister, who she could communicate with thru telepathy? And so the FL is trying to find a place to sleep at on the campus but it happens to be a camera in her dorm so she had to find another place, making her wander around to a nearby pool where she met the Brown hair ML who found in the pool hiding and picked up her earring/necklace that is used for communication. That's pretty much what I remember so if you guys remember the name of this PLEASE TELL ME. The genre is suppose to be romance, school life, supernatural? Idk