Kanazura

Pls help meee huhu i can't fully remember it but what sticks in my mind is

-murim
-mc is type prince
-there is a crippled old man he got help and it's quite strong,
-the old man is like the head of information guild he knows shits
-also the mc seems to forgot that he have a fiancee
-the fiancee is quite annoyed at him before,
-and got mad when he doesn't recognize her

Pls what's its title?? I thought it's from asura scan but I can't seem to find it

Pls gimme recc like this https://www.mangago.zone/read-manga/girl_under_trial/