I Had a Flash Marriage, But Why Did My Sister Also Get Married? | I Had A Flash Marriage, And Now My Sister Too? | Wo Shanhun Jiusuanle, Zenme Jiejie Ye | 我闪婚就算了, 怎么姐姐也

Synopsis:
Zhou Shengsheng escapes her abusive husband and meets Mo Xiao and Mo Xing. After a one-night stand with Mo Xiao, she discovers she's pregnant. Mo Xiao proposes and takes her and her sister, Zhou Anning, home. As they live together, Zhou Shengsheng wins Mo Xiao's heart, while Mo Xing falls for Zhou Anning. Eventually, the two couples live happily ever after.

Character List with Actors:
- Zhou Shengsheng: Liu Xiyu 刘夕语
- Mo Xiao: Min Jie 闵杰
- Zhou Anning: Wu Haoxuan 吴浩瑄
- Mo Xing: He Lianfei 何连飞