Lin Mu, an ordinary social worker, died in an "accidental" car accident, but his consciousness was forcibly bound by the cold "Supporting Role Counterattack System". In the name of "maintaining the stability of the multiverse story line," the system threw him into the world of "Vampire Knight" and became a transfer student with "zero presence" in the night department of the Black Lord Academy. Here, the fateful entanglement between purebloods and hunters, the mystery of Yuki's life experience, and the abyss of hatred for Zero are all scripts that he must "spectate as a supporting role".
The task given to him by the system is the shackles of contradiction: to record the signs of Cone Sheng Zero's blackening as "Observer Zero", to prevent it from getting out of control as "Yu Ji Guardian (pseudo)", but is strictly prohibited from interfering in any "major events". He wandered in the night like a ghost, using his slight kindness of "passing a handkerchief" and "pointing to the safe exit" to stir up ripples in Ling's painful and struggling heart, but also caused him to fall into a torn between "obeying the system" and "sticking to his conscience".
Until he saw fragments of the truth: the car accident was not an accident, but a clearing operation of the "Dark Night Parliament"; the "Supervisor Sequence" data stream occasionally leaked from the system interface exposed its secret connection with the Parliament; Jiu Lanshu's "Moonlight Feast" invitation, the defection warning of the Black Lord Hui Yan, the curse legend of the Blood Sacred Artifact... All clues pointed to a high-dimensional conspiracy - his death, Zero's fate, and Yuki's existence were all pawns on the Parliament chessboard.
When the system collapsed due to his resistance during the melee at the "Moonlight Feast", and when Zero's fangs pierced his carotid artery to complete his transformation into a "mediator", Lin Mu finally understood: the so-called "counterattack of a supporting role" is never about living "as it should be" according to the script, but under the high-dimensional control of the system, with a transparent body with "zero presence", carrying Zero's darkness and light, tearing apart the shadow of the parliament, and creating a way out for the value of "people".
This is a declaration about "existence": When the system says "you are a supporting role", he says: "I write my own destiny."
Concept: When the "supporting character" is forced to become a pawn, he uses his transparent body as a shield and free will as a blade to tear up the script in the bloody world and crown "existence" itself as king.