The Obvious Way to Deal with Protagonist Aura Is to Cheat

What would you do if you transmigrated into a game world and found out you weren't the protagonist?

What if you found out the protagonist was the Chosen One and you were just some passerby?

What if you found out the protagonist was not only asking for a beating, but was also trying to steal your girl?

Su Xin: Sir, times have changed. Feast your eyes on my MOD slash!

Li Yang: You... chea...ter...! (dies)