My Nemesis and I Found Our Happy Ending in a Parallel World

Lin Yutang became a major in the Empire at a young age. With an impressive record and striking looks, he became the Alpha of everyone's dreams, and was even named the new generation's "Best Alpha" by the Empire. But another person received the same title: his lifelong nemesis, Zhao Xianzhang. Damn it! If they're both the "best," how can there be room for two? They were born rivals. They competed in aptitude from birth, grades at school, and pheromones after their presentation... They'd been trying to outdo each other since childhood, always at each other's throats and unable to stand one another. - During a mission, Lin Yutang was caught in a rift. He never expected that when he opened his eyes again, he'd become himself in a parallel world. Even more surprising, his parallel-world self was the Empire's Omega of everyone's dreams! And he'd gotten together with his archenemy!! They were now preparing to have a baby!!! The usually composed and self-possessed major fell apart. Pairing: green-tea big puppy & fiery little sweetheart (?) Theme: Love