Rather than calling this Armor Hero fan fiction, it's more accurate to say it's a straightforward romance built around the tangled relationships between Bei, Xi, and Bing. Aside from the characters' unrealistic pasts, it's much like any ordinary romance. The backstory goes something like this: Bei and Xi met Bing in an orphanage as children. Bei and Bing pledged to be brother and sister, using a conch shell as their token, but Bei Miao harbored feelings for Bing Er that he couldn't explain. Later, King Jie set fire to the orphanage. Bei Miao fled in fear, leaving Bing Er behind. Back then, she was called Xiao Xue. Xi Zhao stepped forward to help, and they were both taken to the Shadow Realm, where they endured brutal training and torture, supporting each other for ten years. Ten years later, Bing Er eagerly tried to reunite with Bei Miao, who had become an Armor Hero, but was unintentionally hurt by his harsh words condemning those from the Shadow Realm. In a fury, she returned to the Shadow Realm, only to witness Xi Zhao's defection. Bing Er pleaded with him to stay, but to no avail. In despair, she turned to evil. Later, she was rescued during the climactic battle between light and shadow, and she and Bei Miao and Xi Zhao finally put the past behind them.
Why isn't it updated? I'm looking forward to the next plot, the writing is great