While delivering takeout, I unexpectedly transmigrated back to my high school days with a System. I saw the girl I’d always loved, and just as I thought I’d marry a rich, beautiful woman and reach the pinnacle of life, an unexpected turn of events came. The System mutated. It turned out to be a vessel for the consciousness of a person from the future. In that future, endless war had caused the Earth’s core to rupture, leaking spiritual energy. Some humans began to awaken, and their abilities determined their ranks. The convenience of spiritual power gradually led humanity to abandon technology. A group of non-awakened humans, opposed to this change, used the most advanced technology to send a consciousness back in time to gain an early advantage. That consciousness was the System. But my unexpected transmigration happened at the same time as the System’s, resulting in two consciousnesses within one body. To keep the original host from overloading his brain and dying, the future consciousness chose to fall dormant and wait for the right moment. But I, the one who had transmigrated back, became an anomaly. The System gradually began to merge with me, and I started to unravel its secrets...