I Can't Be the Villain, so I Have to Try My Best to Become the Protagonist.

Li Mu, a good young man in the 21st century, time-traveled into a dung novel called "Be Strong as a Villain's Younger Brother" by an unexpected chance. It was obvious that other people who traveled through time traveled either as Long Aotian with his own protagonist aura or as the protagonist of a cool novel with his own system, but when they arrived at his place, they became the helpless big villain brother. Until one day his and the protagonist's lives were interchanged... Li Mu: "My cheap brother, actually I don't want to do this. If I want to blame you, blame those old men."