"Water has no weight—" "Water magic is the weakest—" In a world where people believed it was impossible to defeat monsters with water magic, Nero, a water mage, was branded useless and cast out from his party. However, Nero discovered a fundamental truth: water does, in fact, have weight. Realizing this, he awakens his true potential and begins to defeat enemies using his newfound mastery of water magic! With everyone doubting his abilities, Nero relentlessly overcomes his foes, joined by the slime "Swim." Together, they challenge the conventional wisdom about water magic, turning the tide in this thrilling underdog story! The tale of rebellion begins here!