I Parry Everything

Ore wa Subete wo [Parry] Suru: Gyaku Kanchigai no Sekai Saikyou wa Boukensha ni Naritai · 俺は全てを【パリイ】する ～逆勘違いの世界最強は冒険者になりたい～

In a rural area of Clays Kingdom, young Noor's sickly mother passes away, prompting him to act on his dream of becoming a righteous adventurer. As Noor arrives at the royal capital, he is told that he must first acquire skills, but even after months of practice, he has only improved his ability to parry swords. This does not deter Noor, who decides to give the training his all. Fifteen years later, Noor is finally an adventurer, albeit with a condition: he can only take on miscellaneous non-combat tasks. When he stumbles across a minotaur terrorizing the capital, however, he utilizes his parries and limited skills to the maximum, defeating the threat and saving a girl. Unbeknownst to him, she is the princess of Clays Kingdom, Lynneburg! Although reluctant to accept any reward, Noor is gifted a peculiar greatsword, and Lynneburg insists that he become her instructor. With the neighboring nation apparently gearing up for war with Clays Kingdom, Noor might just play a bigger role in the conflict than he thinks. [Written by MAL Rewrite]