Sismance Dramas devoid of Romance

The list contains dramas having full-tone Sismance( plot mainly focusing on the story between female protagonist & deuteragonist ) without involvement of the main FL characters in Romance (exception** COM, although FL is not having any romantic feelings for any male characters in the present timeline where the narrative of the drama takes place but her character growth is shown through her past lovelife & marriage filled with betrayal ultimately moulding her character.