You Asked Me to Marry into Your Family in My Brother's Place. I'm Invincible, So What Do You Regret?

When he woke up, Li Chengfeng found himself a lowborn son of a prominent Qingzhou family. The Lin family had fallen on hard times, so he was forced to take his older brother's place and fulfill the marriage contract with the Lin family's eldest daughter, Lin Daiyu. Rumor had it that Lin Daiyu was ugly and suffered from an old illness. After being taken to a mysterious sect to cultivate as a child, her illness returned and she was not expected to live much longer. So she returned to her family and married Li Chengfeng to bring him good luck. Li Chengfeng never dreamed that this marriage meant to bring good fortune would activate a reward System... And the Lin family and Lin Daiyu seemed just a tiny bit different from the rumors...