Boku no Tsugai wa Neko Shinshi

Toushiro, a young omega, works as a servant to Alex, a British diplomat and beastman.
Toushiro, who has always been used as an "entertainment toy", is frightened at the idea of having to "serve" a beast.
However, Alex is quite upset about the situation of the Omegas in Japan. This British gentleman treats him with kindness and respect.
It is the first time Toushiro sees such kindness.