My Knights of the Round Table

"I thought I was just an ordinary person."
"Suddenly one day, a beautiful woman stood behind me and asked me to draw that damn sword."
"At this time, I suddenly realized that something was wrong."
"But this is not a big problem. I have read the death of King Arthur. I am invincible here. As long as I don't have Mordred, marry Guinevere, and be a king honestly, there will be no problems. "
"but...?"