It's Really Terrible, the Stinky-Faced Secret Guard Turns Out to Be Hard-Mouthed and Soft-Hearted

[Two male protagonists + general x secret guard commander + time travel + system + slight abuse + sweet pet + double cleansing] The general is funny, considerate, and reliable in times of trouble. The leader of the secret guard looks stinky on the outside, but is actually soft-hearted. Travel through time and become a young general with great military exploits in the Yan Dynasty. But the general was framed by a villain for colluding with foreign enemies, and died tragically at the age of only twenty-five. The system gives tasks to reverse the general's fate of being framed, subvert the historical facts of the Yan Dynasty's demise, and find the real collaborators who are not recorded in history books. The secret guard commander accepted the emperor's order to investigate the general's collusion with the enemy. General vs. Secret Guard Leader Both sides dislike each other. At this time, we, the social beasts of the 21st century, are standing in the face of the general, pretending to be crazy and acting stupid, trying to get through. Late system marginalization. Make up history, please don't take it seriously. Just read the article to feel comfortable, please don't use your brain.