Byoujaku na Imouto ni Subete wo Sakushu saretekita Reijou wa Mou Nanimo Ubawasenai

Colette Milliact has been subjected to rigorous education for many years as the successor to the Earl's family. One day, her younger sister Liliane takes away both her fiance and her position as the successor to the Earl's family. Colette despairs when she learns that everything she has endured for her sickly sister was planned by her. She decides to give up her position and sever all ties with her family. Colette leaves the Earl's family with nothing but the clothes on her back, but she reaches her physical limit and collapses in the forest. However, a young man she has never met saves her. "Colette, please marry me." Who is the young man?

This is the story of a young lady who has had everything taken from her by her sister who pretends to be sickly, and how she finds happiness.

(Source: Ura Sunday, translated)