Murder Without Killer

K accidentally killed his stepfather during an argument and then fell to the ground due to fainting and bleeding. When K woke up, he found that he seemed to have become A, who had a happy family, a rich family and a super handsome boyfriend. A, who seemed to have become K, was taken to the police station for interrogation. K knew that time travel or soul exchange could not exist in the real world, so why did he wake up as A who had been in a car accident and had a cast on his leg? What frightened K even more was that one day she accidentally fell off the chair and found that her leg in a plaster was not injured at all! And there seems to be some ulterior secret hidden behind the closed door of this castle... On the other side, A woke up from the hospital, and a strange policeman sat in front of her bed and announced a tragedy to her... (No harem, no time travel, no golden fingers, not cool writing, not brainless, two heroines, warning: this article is very realistic and a bit heavy-handed in its description of human nature, please proceed with caution)