Ookami he no Yomeiri
Not omegaverse, just animal characteristics. A poor rabbit village negotiates Kaede as a bride for the wolf tribe to help pay for food. Kaede is reluctant at first but willing to make things work with his positive attitude. If only the groom also reacted to anything instead of being gloomy and uncommunicative all the time.
Muri Marriage
Two neighboring villages have a tradition where one person from each village must get married every generation in order to keeps things peaceful and avoid disasters. This time however, the two chosen for this ceremony are both men, and it won't be over until they have their wedding night
Okusama wa Alpha
Two alphas agree to be married but part of the contract is having a child together and they just can't figure out who is going to bottom...
Non-Refundable Alpha
In order to save his parents company, an omega is married off to a young ceo of a major company. Even though the omega just wants to have alphas wait on him hand and foot, he accepts his fate only because his alpha husband is such a hunk. Even so, how did his nerdy small high school friend turn out like this?!
Ake no Hana ni Kuchibashi
Weird bird people story. Asanagi is a disfigured bird person with wings for arms, even so he is arranged to marry the king for some reason. After the marriage and moving into the palace, his self esteem does not increase after the king doesn't complete their first night together and leaves in the middle. It's a weird little story but the couple seem to genuinely like each other and hope for the other's happiness (sometimes to their own detriment)
The Crows Marriage