Sekai Saikyou no Doryokuka: Dare mo Shiranai (Doryoku) no Sainou wo Sazukatta node Ore dake ga Dekiru Kikakugai no Doryoku de Saikyou ni Naru

In this world, God grants every person a "talent" upon their twelfth birthday. While those around him received impressive gifts such as "Swordsman" and "Witch," the talent bestowed upon Rivele was "Effort"—an ability no one had ever even heard of. Meanwhile, his childhood friend Anna was granted the skill "Dragon Knight," one destined for battle. Determined to protect her, Rivele vows to keep Anna away from combat—and to that end, he sets out to become the strongest in the world through sheer, overwhelming effort!