A girl saves Houjou family's third daughter from drowning herself. The girl takes her place as Houjou Ran who shall become the Tendou family's bride but she gets exposed later on. She later on stays at the estate and acts like the “wife” of that household, while she stays there she’s to be the maid for the “wife”. She also has experience with martial arts, archery, fighting, etc. Which is why she’s so good at protecting herself and the people around her. She falls in love with the husband of this story later on and he also falls to like her as well.
Tendou-ke Monogatari