Waiting for an Echo

After the aurora in 2087, 0.3% Of humans can see emotions frozen in time - they are echoes. The crack is a wound in the timeline. The active ingredients extracted from the tentacles can cure cancer and also produce deadly toxins. There are six levels of perceivers, and she is the highest S level - every time she uses her ability, she loses a piece of herself. Tianyan loses control, and the time rift intertwines the two worlds. She stitches the cracks together with memories, and he fights her forgetfulness with notes. Fate wants them to forget each other - save the world, or keep you?