Ex Rank Supporting Role’s Replay in a Prestigious School Chapter 1512

Synopsis

When I cleared the final chapter of a game that was a national failure, I became a side character within it. A non-standard, immeasurable, EX-rank unnamed side character.

🎭 System Interface: The "Tactical Butterfly" Protocol

This story is a Mystery/Slice-of-Life Hybrid where small changes in the present prevent catastrophic tragedies in the future.

Component	Classification	Tactical Implication
Narrative Engine	Game Transmigration	The MC treats reality like a "Replay," calculating every move to save "Playable Characters."
Primary Genre	Urban Fantasy / Academy	A "National Failure" game setting that takes its school life very seriously.
Atmosphere	Wholesome yet Melancholy	Moves between campus festivals and heart-wrenching backstories of trauma.
The "X" Factor	Mythological Chess	The conflict is a 5,000-year-old war between the Tiger Clan, the Bear Clan, and the Dragon Clan.

📂 System Interface: The Status Window (The Chessmaster)

Euishin succeeds not by being the strongest, but by being the best prepared.

Attribute	Jo Euishin (MC)	The Class 0 "Kids"
Core Identity	The Guardian Extra.	The Tragic Genius Protagonists.
Combat Style	Tactical Prep + Using Item Cards.	High-spec combat abilities (Sword, Gun, Violin).
Major Weakness	Chronic Self-Neglect: He forgets to value his own life while saving others.	Unprocessed Trauma: Most were destined to die or be corrupted in the original game.