Ravenend no Hitobito

The noble mansion Ravenend House stands in the countryside, home to an eccentric master and his loyal staff. One quiet day, the butler, Mr. Condor, suddenly disappears. A trusted figure who had always been relied upon by the servants vanishes without a trace… Where could he have gone? The peculiar master, Lord Ravenend, stays locked away in his room, offering no help. Then, one day, a young butler arrives to take Condor’s place…? As this new butler enters the household, the quiet routine of their daily lives begins to unravel…

(Source: Kadokawa, translated)