The Great Snake's Bride Vol. 3 (manga)

Miyo and Daija have slowly grown closer as their unconventional relationship deepens. Now they feel ready to try and deepen their physical connection as well. But both bear scars from the past. Miyo shares her family's sad history and the source of her pain—before a mysterious monk hunting for Daija brings his own history to light. The gulf between species is a vast one, and dark clouds loom on the horizon, threatening what seemed so recently like a blissful relationship.