HCL is hydrochloric acid, which is dark and suspenseful. The first girl was bullied by the second girl, who cut her face with a knife, destroyed her hands with Hcl, and buried her alive. The second girl disguised herself well and robbed the first boy. The first girl lost her memory and was rescued by the second boy and became his sister. Later, the second man became a doctor and discovered that the first woman had a potential dual personality. The first woman became a psychiatrist and turned dark after remembering it. The second woman came for psychological consultation and died in pain under the hypnosis of the second woman. Everyone was probably dead in the end.