Two male protagonists, abo, 1v1 through the book
A modern Beta social animal once traveled through time and became the top Alpha in the ABO world, and was forced to marry a beautiful and powerful Omega from a rival family. On their wedding night, he discovered that the other person's pheromone was the same scent of the laundry detergent he had been using for three years before time traveling.
What's even more outrageous is that this "beautiful, powerful and miserable" Omega is also wearing one.