This is episode 34 of 70 of Oath of the Blade. Play it below, then continue straight into the next episode — the whole season is free and needs no account.
The middle of the season, where the conflict escalates.
James's master sacrifices himself to defeat the King of Northland and entrusts James with the sword art, warning him to draw his sword only for love. After ten years of silently protecting the heroine, James, now seen as a waste, must unsheathe his sword when Northland remnants return.