Cheng Yu is a coward and ran away after being with Lu Jing'an for half a year. He thought he was hiding far enough that Lu Jing'an couldn't find him. Unexpectedly, one day, Lu Jing'an suddenly appeared in his life again and stayed there for a long, long time.
When he escapes, he chases him, and he cannot fly without wings.
Running in both directions, breaking up and reuniting.
