Suda Anzu was working alone to complete her self-developed powered suit, "Iron Heart." This suit was originally researched jointly by her father, Dr. Suda, and her colleague, Dr. Kirita, and its development progressed steadily each day. However, conflicts over the suit's superhuman capabilities began to erupt one after another, as malicious individuals started targeting the Iron Heart. While Anzu aimed to use its power for justice, she became entangled in the schemes of those seeking to exploit it for military purposes. Amidst this turmoil, she resolved to don the Iron Heart and confront evil, determined to prevent its misuse from bringing suffering to innocent people.