Torano Tantei Jimusho e Youkoso

A happy loving life, woven by a beastman, a human, and a half-breed.

After a string of bad luck, Kaisei Yano finds himself without a home, job, or money. He happens to find a poster offering a job with a place to live, but the employer is a scary-looking beastman named Jiu Torano.
He starts working as a secretary for Torano, who runs a detective agency, but this workplace turns out to be full of trouble!　 He also has to help take care of Torano's niece, Yui......

(Source: B's-LOVEY, translated)