What I remember is that the main character (MC) fights against the demon lord/demon(?) with his party. The MC almost dies after sacrificing himself, and is abandoned by his party because they think he is dead.
Years later, the MC wakes up and comes back to town, and finds the saint(?) married to one of the party members. The MC looks happy, but saint seems unhappy in her marriage, preferring the MC to her husband. He does meet the other party members at their wedding and they recognize him. The MC went to the wedding with another girl that he met at a market.
I think that this is not a revenge story.
Chapter 1, in my opinion, has similarities with the manga Koko wa Ore ni Makasete Saki ni Ike to Itte kara 10-nen ga Tattara Densetsu ni Natte Ita..