Hisabisa ni Kentoushindan wo Uketara Saikyou Status ni Natte Ita ~Tsuihou Sareta Ossan Boukensha, Imasara Eiyuu wo Mezasu~

An old man adventurer gets a restart and becomes the strongest with the late-blooming cheat ability, "Late Bloomer" [Taiken]?

Kyle, an adventurer who was kicked out of an S-rank party and has been working solo for 10 years, grows suspicious of his own strength after realizing he can now defeat the highest-ranked monsters with a single blow. He seeks a doctor's examination. As a result, he discovers that his unique skill, "Late Bloomer" [Taiken] (which slowly increases his stats every day), has finally awakened...!?