I'm NOT the main character!!

In a world ravaged by the Void—a malevolent force born from a fallen star that corrupts all it touches—humanity teeters on the edge of collapse. The once-great noble family of the protagonist has fallen into ruin, their prestige as earth mages shattered by the death of their patriarch and the relentless spread of the Void. While his mother struggles to hold their barony together and his elder siblings shoulder the family’s responsibilities, the protagonist is overshadowed, seen as just another "background character" in a world spiraling into chaos. But everything changes when he discovers an ancient, forgotten tome infused with the power of a god named Truth Seeker.