Wish Upon a Dragon

Is he... in heat?! In a world where humans and beasts live side by side, Sakuya enjoys life as a newlywed - until her human husband tragically dies of illness. Bullied by her mother-in-law and with nowhere to go, she finds herself contemplating a desperate act... until she catches sight of a dragon flying overhead. Shizuomi, a half-dragon priest from a nearby shrine, comes to her aid, soothing her wounded heart. But one night, her gentle guardian pulls her into his embrace...! A heartfelt love story between a grieving widow and her dashing, beastly protector!

(Source: MangaPlaza)