My Husband Is the Hero of a Pure Romance Novel

[Sorry, I have an unusual fetish. Both male leads are heterosexual in essence. For details on how to read this, see the author's note in Chapter One.] A Feng picked up an amnesiac man and made him her husband. They'd been married for two years, and their relationship was a happy one. Her husband, Fang Mengbai, was an ordinary schoolteacher, refined and handsome. He loved her dearly, and A Feng loved him just as much. She believed they would go on living in harmony, growing old together. Until one day, a man appeared, strikingly beautiful and cold as ice and snow. He said his name was He Fengchen, and that he was Fang Mengbai's male spouse. Her husband, Fang Mengbai, was the foremost disciple of White Deer Academy, the world-renowned Sword of Painting. This celebrated champion of the righteous path had betrayed the academy overnight, then wiped out the entire lineage of the head of the Big Dipper Sword Sect, killing several hundred people. That was how, gravely wounded and with his memory gone, he ended up in her home after she found him. Only then did A Feng realize she had transmigrated into a danmei novel. Her husband, Fang Mengbai, was the novel's main gong. - He Fengchen was born into the Daoist tradition. Serene and aloof, he lived by strict rules and wielded a qin and sword with the grace of drifting wind and falling snow. He was known alongside the Confucian Sword of Painting, Fang Mengbai, as one of the Twin Pillars of Confucianism and Daoism. The two had entered into a bond thirty years ago, and remained together until the incident involving Fang Mengbai. By the time He Fengchen found Fang Mengbai, there was already a young wife by his side. At first, He Fengchen paid A Feng no mind. Until he found himself unable to look away from her. He was enthralled. - The two men, once perfectly in tune, eventually became enemies, each wishing the other dead. [Note: The two male leads only entered into a contractual bond. They didn't register their marriage, complete any paperwork, or swear an oath before the gods, so it doesn't count as a real marriage.] Theme: Keep your heart on the righteous path.