Five Alphas, One Omega

What if Kate have 4 identical sisters. Quintuplets. They all are proud strong alphas, and meanwhile. There's a omega named Humphrey who had a hard time to choose which one of them should become his mate. On the other hand, they have to deal two laws. Alphas and Omegas can't be mates, and no polygamy if Humphrey wants to married all five of them.