Responses
not exactly your description, but you seem unsure, so maybe?
https://www.mangago.zone/read-manga/while_you_re_in_love/
It's a start! thanks for the new book ><
Y'all, I've been trying to find this manga where the MMC and the MFC are like deeply in love, but the MMC loses his memory. And I believe the MMC is like a duke or something and the MFC is a knight OR SOMETHING. So like the red headed-princess or wtv tries to convince the MMC that him and her (the red head) were deeply in love or something.
Than like the MFC dies saving the red head and the MFC leaves a letter for the MMC about being sorry or something...
I think the MFC has uh short blonde hair.. idk.