Brandoll

The comedy adventure series of an proud elite guy who walks accidentally into a funny and unlucky situation.

Fen Dytry was invited to be a member of the elite royal army unit, SDF, but he is forced to become a member of another SDF, a secret royal agency whose main mission is "finding stuffed toys with very funny faces called Bran Dolls". Fen hates such an unglamorous job but gradually begins to devote himself to the job, with his good-natured comrades...

This story does not has explicit m/m factor though Fen unknowingly loves a princess who disguises herself as a male (but who may be a male who disguises himself as a princess who disguises herself as a male)!