Llenn is a passionate solo player in the virtual world of guns and steel known as Gun Gale Online. She has a weakness for all things adorable and dresses entirely in pink. Her seriousness and dedication to the game have enabled her to acquire many skills. One day, she discovers the pleasure of hunting other players, a practice known as PK (Player Killing), and becomes so passionate about the game that she earns the nickname The Pink Demoness. Llenn then meets the seductive and enigmatic Pitohui, with whom she gets on wonderfully. On Pitohui's recommendation, they decide to take part in the "Squad Jam" event.