Let This Grieving Soul Retire

Krai makes an oath with his friends to become the strongest hero in the world...but his hopes are quickly dashed when he realizes that his talents lie elsewhere. Despite the reality check, the expectations from the people around him seem to rise exponentially every day. Now Krai must deal with this huge misunderstanding as well as the outrageous consequences. <em class=de-emphasized>(from manga)</em>

Synopsis from Anime News Network