I Have a Pair of Sneaky Eyes

Gu Yuan is 19 years old and a small owner of a coffin shop. He can see something he shouldn't see in his left eye - the line of cause and effect. Three years ago, he survived after drowning for 8 minutes, and these eyes followed him. Grandpa left a door hidden in his eyes. When the door opens, you can see the truth between Yin and Yang.