Subaru Natsuki, who returned from the new Three Kingdoms

Subaru Natsuki has time-traveled once again!
After Rom's loot storehouse and the white-haired woman named Satella were attacked by an unknown enemy.
Natsuki Subaru was surprised to find that he had not died, but had instead arrived in ancient China during the Three Kingdoms period.
However, this world seems rather unorthodox.
What does it mean that Liu Bei, Guan Yu, and Zhang Fei are brothers in name only but not close friends in reality?
What does it mean that Zhuge Liang, seemingly incredibly wise, was actually a submissive and submissive wife?
What does it mean that in the Battle of Guandu, a force of 700,000 was cut down head-on by a force of 70,000?
Having spent so much time in this abnormal world, Natsuki Subaru felt that he himself was becoming a little abnormal.
He finally managed to make a name for himself in the Three Kingdoms era by relying on his ability to return from death.
Just as Natsuki Subaru was about to become a heroic figure and soar through the heavens, he was suddenly diagnosed with a serious illness he had suffered from since childhood and died on the spot.
I thought I would die because the incurable disease could not be cured by returning from death.
Unexpectedly, he found himself back in front of the fruit stand in the world he had first traveled to.
Emilia: "Subaru-kun, will you be my one and only knight?"
Natsuki Subaru: "Sorry, instead of looking for a lord, I'd rather create one myself!"
Rem: "Subaru, why did you go to this lengths for me?"
Natsuki Subaru: "Because Rem, you are a precious servant!"