Both male leads purposely deceive the female lead about their identity from the very beginning in order to either protect her or keep her close to him. If you want a short length series with angst and a love-hate relationship, these are good picks.
Both ares stories of a love-hate relationship wherein the man lied to her about his identity and is framed into being guilty of murdering her family, and though she hates him she can't get rid of her feelings for him.
Both are shorter, romance/historical dramas in which the FL is being married to the ML against her will. Both have a scene of the FL gambling with the ML able to accurately guess the number to help her win.