My Alpha, My Omega (MxM, Mpreg)

The Omega werewolf is a late, late bloomer, so he doesn't even realise that the Alpha heir of his own pack is his mate. Add to that, their age gap makes him wary of his Alpha but at the same time confused as of why they keep crossing paths in the pack grounds, ever since the Alpha moves into the pack house together with some of the mateless pack members. Meanwhile, his younger Alpha keeps trying to catch his attention subtly, and later on, under the secret help of some of the pack members.