I Was Supposed to Be a Background Character, Not the Villain!

Office worker Lu Jiayi's mundane life shatters after a mysterious workplace death thrusts him into a world of supernatural chaos. Now he's caught between a red-haired chuunibyo knight from another realm, a reincarnated demon lord convinced he destroyed her world in a past life, and a brooding antagonist with an "evil villain redemption system" who insists Lu Jiayi is the ultimate villain of their story. The problem? Lu Jiayi was supposed to be just a background character. As reality warps around him and supernatural forces converge, he must navigate this absurd new existence while everyone tre…