Remnant: Kemonohito Omegaverse

Daato and his little sister Bella live in an orphanage, but their lives are far from ordinary. As Omegas, they face a grim fate—once they experience their first heat, they’ll be forced into marriage. Daato is desperate to keep his sister close, especially after discovering the priest’s dark secret: instead of arranging proper marriages, he’s been selling the Omegas off. When Bella unexpectedly goes into heat, their situation becomes dire. The only one who steps in to help is Juda, a mysterious alpha beast-man with unknown intentions.