She Called Me from the Abyss

In 3035, the world entered an era of synchronized nightmares. At 12 o'clock every night, everyone is forced to enter the same nightmare world-Abyss City. If you die in a nightmare, you will permanently lose your memory in reality. Lin Yuan is the only exception. Three years ago, he was trapped at the bottom of Abyss City and permanently lost the ability to sleep after escaping. But he discovered that he could enter other people's nightmares while awake. Until one day, he heard a voice in his nightmare: "Lin Yuan..." That was my sister's voice. The person who stayed at the bottom of Abyss City for him three years ago. She had been waiting for him there. Every day and every night, I am swallowed by nightmares and torn apart by fear. But she was still calling him. Lin Yuan only has seven days. Seven nightmares, seven fragments, seven deepest memories. The Nightmare Lord said: "You can't save her. Because every step closer, you will be further away from the 'real her'." Lin Yuan said: "She's my sister."