Both are contract marriage stories in which the couple actually met years before in school and the ML had a crush/considered her his only friend. Both MLs are seemingly cold/withdrawn but have a warm heart, and both have trauma from the loss of their brother. Both MLs have a sick relative (mother vs. grandmother) who they're making happy by the marriage/etc.
The main couple have a childhood connection they don't realize/remember, the ML (or both) have suffered some trauma in their childhood. FL is employed by the ML/his family which requires them to live together and leads to them falling in love. ML's closest family (mother vs. grandmother) is determined to see him married and over-involved in trying to get the main couple together. Both dramas have similar pacing and feel. Also, the SML actor in PL is the ML of TTFIL.
Contract marriage to genuine love. ML falls and chases FL first. ML has a traumatic past, is controlling, and seems cold at first. ML and FL have a past connection that the ML remembers and the FL doesn't know until much later. There is a scheming SML who gets close to the FL in order to hurt the ML.
