Burn the House Down

The Mitarai family are wealthy and they have run a hospital for generations. One day, their home burns down in a fire. 13 years later, Murata Anzu, from a housekeeper agency, is hired by Mitarai Makiko. She is the second wife of Mitarai Osamu. Murata Anzu soon begins to work at the Mitarai's home as a housekeeper. She has a secret purpose to work in their home.
(Source: AsianWiki)
~~ Adapted from the manga series "Mitarai-ke, Enjou suru" (御手洗家、炎上する) by Fujisawa Moyashi (藤沢もやし).