I Really Am Not the Protagonist

Not every time traveler is a protagonist... Not everyone who has a system is a time traveler... In the world of cultivation, the first thing is not to be promiscuous, and the second thing is to hug your thighs... Lin Lang has to remind himself every day that he is not the protagonist. This is a story in which the protagonist does not want to be the protagonist, but does what the protagonist is not doing, but completes what the protagonist should do...