"You've already gotten this wet... how lewd." My husband's gaze makes me sensitive, and when he stirs my core with his fingers, I can't help but... -- One day, a marriage proposal arrives for my younger sister...

It is the Taisho Era.Sayo, who was born as the "bird in a cage" of the Tenkanji family, one of the most prestigious families in the financial conglomerate world, had a secret that she hid. The curtain rises on...