Infiltration! Agent on the Edge

It is the Meiji period. To obtain the "Contract Seal", an debt-ridden spy must infiltrate the Mikage family, one of Japan's 3 major commercial groups, as a maid. There, she meets a mysterious man, dressed in a maid uniform... In order to repay her father's debts, she carries out her mission, all while being rushed by her boss. (Source: DLsite)