this or that (drama tropes edition)

Strangers  

FL as a detective or FL as a doctor

ML is a normal office worker

Contract marriage/relationship or Arranged marriage?

Zombie

In historical drama, ML seeking revenge to FL's family or FL seeking revenge to ML's family

ML's parents happy if he wants to marry a nice woman with ordinary qualitities

Sismance or Bromance

siblings bond

amnesia or terminal illness

ML being introvert

ml being pevertly cute or ml who knows nothing