Mitarai-ke, Enjou Suru

Assuming a false identity and working as a housekeeper, “Shizuka Yamauchi” infiltrates the well-to-do Mitarai household in pursuit of the truth. Thirteen years prior, when the Mitarai home was engulfed in flames, Shizuka’s mother was forced to take the fall for the crime. Now, on her first assignment with the family, Shizuka homes in on Makiko, the beautiful second wife of Dr. Mitarai. But Mrs. Mitarai harbors sinister secrets of her own…

(Source: Kodansha USA)