Seven Lost Pieces

As a result of an accident, Elena falls into a coma and Ethan experiences a strange occurrence where he can hear voices inside his head. Ethan thought it was all just a hallucination due to the trauma he received after the accident, but all his speculations changed when he met a girl named Caitlin. Caitlin said she came because Elena gave her a mission. As if that wasn't enough to give Ethan a headache, Caitlin also said that it was her duty to find her seven pieces and save them all from harm because that way, both Caitlin and Elena could eventually get what they wanted. Caitlin with her happiness and Elena with her life. Then what should Ethan do, who plays Elena's lover and is the only person who can help Caitlin in his world? Will he believe everything Caitlin says and come along to help, or will he not believe it and ignore the girl instead?