Typical and Cliche old kdrama vibe. The korean version is Islamophobic (ch18) but the official translation changed it, I guess the author feels like it's okay to be racist as long as only koreans understand her.
"Fl has terminal cancer catches husband cheating on her with her best friend which leads to her death, only to wake up 10 years prior and uses her knowledge to change her fate and get revenge on both of them"
Marry My Husband