U22
He probably watch it but (AUTHOR) might be doesn't want our mc to be ABLE to know all the Anime PLOT maybe thats why he forgets some of his past memories might be the Author plan it would be Annoying, Less Enoyable and interesting an fights that helps mc improve in a battles if mc knows everything about the Plot of Failed Knight Chivalry he would prepare for everything an being all whinny when things doesn't goes his way for 2 or more chapters