Eric, a brilliant young alchemist, is fired from his alchemy atelier because his skill, mistakenly labeled "Deterioration," appears to ruin any raw material he touches. Left with no choice, he registers as an adventurer to make ends meet. However, Eric quickly discovers the skill's true secret: when used on unharvested raw materials in the wild, "Deterioration" actually mutates and upgrades them into legendary, super-rare rank ingredients! Now aware of his incredible ability, Eric uses his upgraded gathering powers to create high-tier items, gather rare materials, and live a free-spirited, carefree life. Joined by a top-tier female adventurer who recognizes his true worth and a flock of cheerful divine beasts, Eric embarks on an unstoppable slow-life adventure.