In the virtual realm of Gun Gale Online, the diminutive yet fierce 'Pink Devil' ruthlessly tracks and eliminates players. Contrary to expectations, this feared assassin is actually Karen Kohiruimaki, a reserved university student grappling with her towering height in reality. Seeking solace in the game world, Karen transforms into LLENN, a small and adorable character, basking in the freedom this alternate identity offers. Known for her deadly skills, LLENN crosses paths with the enigmatic Pitohui, sparking an unusual friendship. Encouraged to join the intense Squad Jam tournament by Pitohui, LLENN faces a high-stakes battle royale where victory demands strategy, strength, and grit. Determined to conquer the competition, LLENN must navigate alliances and adversaries to emerge triumphant.