Alcus, a member of the S-rank adventurer party 'Brutal Edge,' possesses the skill <Slime>, which has two abilities: 'Mimicry' to transform into a slime and 'Fission' to create clones. Despite these abilities, <Slime> was considered a useless skill. One day, the party leader Dan exiles Alcus, calling him weak. Determined to take revenge and become stronger, Alcus discovers that his skill <Slime> has a hidden ability: the more he splits, the more experience he gains. Realizing this, Alcus levels up at an unprecedented rate, eventually surpassing everyone, including Dan, and reaching the pinnacle of strength.