My Life as the Retired Hero

On the year I arrived on this continent, I ascended as the Sword Saint at 20 thanks to my unparalleled talent and extraordinary opportunities... Eh? Am I the protagonist? You've got it all wrong—look over there. Yes, that blonde narcissist is this story's real protagonist... Demon Lord? She pulled out at the start. As for a harem... Do you think a character like me has that sort of interest?! Ahem! Anyway, this is the tale of a disenchanted and unambitious Sword Saint...