義姉の代わりに、余命一年と言われる侯爵子息様と婚約することになりました raw 第01-06巻 [Ane no kawari ni yomei ichinen to iwareru koshaku shisokusama to kon’yaku suru koto ni narimashita vol 01-06]

Edith is an orphaned girl who is treated coldly by her adoptive parents and sister. One day, her adoptive sister is offered a marriage proposal to Lionel, the eldest son of the Marquis of Granville, a very prestigious family. However, there is a reason for this proposal... so Edith becomes engaged to him instead of her sister.

"I'm sorry, I can't believe you're engaged to me like this. Can you just bear with me for one year?"

Her fiancé has only one year to live, but pure love brings about a miracle in this happy love story!