Kemono wa Hidamari ni Koi wo suru

Noah was born as a half-beast in a country where the majority of the population is made up of beastmen. Noah's heart is based on his childhood friend Dion, who is also a half-beast. They are both aware of their love for each other, but they try to hide their feelings. Until a doctor cames to them with a request for Dion...

(Source: AlphaPolis, translated)

Note: Includes one extra chapter.