Tendou-Ke Monogatari

Chapter 17: Separate Worlds (1)
Chapter 16.5: Prologue: The Beginning
Chapter 18: Separate Worlds (2)
Chapter 16.5: Prologue: The Beginning
Chapter 18: Separate Worlds (2)
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 her deceit is seen through..?