Yuusha no Oresama ga Madoushi nanka ni!

Kaine is an egotistical and iron-willed knight who has a hard time getting along with Leo, a talented sorcerer. Leo's aloof nature annoys Kaine to the point he throws Leo out of the adventuring party only for the party to continuously lose its battles. Disgraced, Kaine asks for Leo to return but Leo has one condition: Kaine must get on his knees and apologize. Kaine, distressed and humiliated breaks down and seeing Kaine at his weakest awakens something inside Leo...

(Source: Libre, translated)