Story
Eight years ago, Francis' warrior father was arrested for deserting his post when a huge monster tide swept through Sharnwich City. Francis is determined to clear his father's name and save him from his death sentence, but that's easier said than done when he's a low-level warrior hated for being a traitor's son. However, things take a surprising turn when he's betrayed by his party and left to die in a monster lair. Thanks to the sudden activation of a mysterious warrior system, Francis' lethal wounds are healed and his fighting skills are boosted.
Synopsis via AniList (English).