Kaori Tanizaki. First year student at Akakawa Senior high. Sole occupant of her parent's house. Great friends with an idol, the soccer team co-captain, and a loud, cheerful girl she's called her besties since she was six. Trying to take charge in her life, she goes through days in melancholy while monsters, mighty and destructive, appear all over the world, attacking endlessly without any hints to where they are from. The world's only hope is the Super Six, a group of heroes who always appear to combat the monsters with awesome powers. But, working in secret, no one knows who the Super Six are, or what their motive is. Towndown Shibuya is attacked, with Kaori and her best friend stuck in the middle of it. But Kaori is rescued by one of the Super Six: A sixteen-year-old who has found himself unable to return to his home country. Kaori must hold herself together as she faces monsters in Japan, the boy who has suddenly come under her care, ...And the crush she has on him.