Brother, Be Careful? Be Careful Brother!

What does it mean that the martial arts competition will be changed from one-on-one to 5V5, and there will also be a Swiss round? What does it mean that our boss is evading taxes and the master is an undercover agent from Six Doors? What does it mean that after drinking, the whole body becomes red and itchy, and the power increases, is it an alcohol allergy? The time-traveling emperor, the leader of the rebellion, the gluttonous junior sister and me, who is allergic to alcohol, how did I grow from a little shrimp to a hero in this world that was stirred up by time-travelers?