Shuuzou ''Shuu'' Matsutani lives his ordinary life in peace. He has friends, a crush, and a passion for kendo. Dejected after losing to his kendo rival, Shuu climbs a smokestack to watch the sunset where he finds Lala-Ru, a quiet, blue-haired girl wearing a strange pendant. Shuu attempts to befriend her, despite her uninterested, bland responses. However, his hopes are crushed when a woman, accompanied by two serpent...