I'm Mika, Your Housekepper.

Summary

No matter what she is asked, she always replies, "I understand." This mysterious housekeeper, Mika, is dispatched to a family that has just lost its beloved mother. As the family struggles with various problems and is on the verge of collapse, Mika's shocking and unpredictable actions save them. But the true nature of Mika's intentions and her past remain shrouded in mystery...A legendary TV drama from the 20th century that recorded a phenomenal 40% viewership rating is finally adapted into a completely faithful manga!