Midway through the 21st century, individuals endowed with extraordinary strength emerged worldwide. Dressed in striking attire and executing awe‑inspiring acts for the sake of peace, they were dubbed heroes—emblems representing their respective nations. In Japan, a 14‑year‑old middle‑schooler named Teru Momijiyama is celebrated under her covert persona, the nation's hero known as Shy.
Shy, a shy and inexperienced heroine, still has much to master. She doubts her confidence and wonders whether she truly deserves the title of hero. Despite these uncertainties, Shy dedicates herself to rescuing others and doing what is right. As fresh, formidable dangers surface, she must collaborate with global heroes while discovering the true essence of heroism. Through trials and triumphs, she learns that courage is not born but forged in the crucible of sacrifice and that every act shapes destiny.
