Oyasumi, Itoshii Kotori-sama

In a world inhabited by both humans and a race born with brilliant, feathered wings, Shu, a human, works at the family estate of the shy and reclusive Rai, a young winged man who struggles to get along with those around him. When Shu accidentally glimpses Rai crying in his sleep, he makes it his mission to get to know Rai better. Meanwhile, Rai discovers the egg of a winged being abandoned outside his home. To everyone's shock, Rai declares that he will raise the hatchling himself—with the caveat that Shu helps him! What will become of the pair's blossoming relationship now that there's a baby in the mix?!

(Source: Seven Seas Entertainment)