[Western Crossover] Bruce, the Ultimate Son-in-Law

Sorry, I love Lai Bao too much. I swear this is the last one! ABO fiction :) (The ABO setting is only used for marriage compatibility and the purpose of pheromones.) The official blurb: When Bruce returns to Gotham, he discovers that his childhood friend, who vanished for ten years, is not only alive and well, but spent the seven years Bruce was missing living at his home and keeping Alfred company... Following the principle that a 100% match between an Alpha and an Omega shouldn't go to waste (Bruce: ???), they... get married. Then Bruce discovers he's been cheated on... By Batman. Look how happy this Batman is smiling → :) The narrative blurb: Bruce thought that after all his trials and tribulations, returning to Gotham would bring him the biggest challenge of his life: fixing the city. He never expected to find Gotham already running like clockwork. It looked as though Falcone had brought all this about, but after an exhaustive investigation, the mountain of evidence pointed to his childhood friend, who had disappeared around the same time his parents died. His childhood friend, an Omega, is unmoved by his return and is simply staying at Wayne Manor to look after Alfred. Alfred thinks that Bruce, an Alpha, is old enough to get married, and his childhood friend doesn't object, so they hastily tie the knot. But soon, Bruce accidentally discovers that the person standing behind Falcone and controlling all of Gotham is his childhood friend. As Batman, he also realizes that his friend seems to have been in love with Batman all along. To his friend, Bruce seems to be nothing but a substitute, because their pheromones smell a little alike. But his friend doesn't know that Bruce and Batman are the same person. ...Bruce doesn't know whether to lament being cheated on or marvel at fate. As for Ryan Black... He truly never imagined that the silly Alpha who spent every day clinging to him, acting cute, and giving off all that pent-up testosterone at home was the Batman who had saved him in a chaotic timeline. The unrequited love triangle: Bruce → Ryan → Batman Theme: Honesty and kindness