Hazure Skill "Kinomi Master": Skill no Mi (Tabetara Shinu) wo Mugen ni Taberareru You ni Natta Ken ni Tsuite (That Kill You)

In this world, one can gain special abilities by eating a skill fruit only once. To eat another is a certain death sentence. However, Light obtains a skill called "Nut Master," which is unsuitable for battle. He resigns himself to a life as a farmer, but by chance, he eats another skill fruit. At this moment, he learns the hidden ability of "Nut Master."

"Why haven't I died? Is this some sort of new skill—"

This is the story of a lowly farmer becoming the strongest by acquiring numerous different abilities.

(Source: Shousetsuka ni Narou, translated)