Both MLs are posing as their dead, identical twin brother who was a eunuch in order to stay in the palace and investigate their deaths. The FLs learn their secret.

Both are Republican Era mini dramas in which the ML wrongfully blames the FL for something and treats her cruelly, keeping her like a slave in his house.

Both are Republican Era mini dramas in which the FL wrongfully blames the ML for destroying her family and enters his house for revenge where the MLs treats her coldly or cruelly.

Both are Republican Era mini dramas in which the FL wrongfully blames the ML for destroying her family and enters his house for revenge where the MLs treats her coldly or cruelly.

Both are mini dramas in which the FL enters into a contract or rushed marriage with the wealthy ML who uses a wheelchair.

Both are mini dramas in which the FL enters into a contract or rushed marriage with the wealthy ML who uses a wheelchair.

Both are mini dramas in which the FL enters into a contract or rushed marriage with the wealthy ML who uses a wheelchair.

Both are mini dramas in which the ML blames FL for his sibling's death and keeps her as a prisoner/slave in his house to punish her.

Both are mini dramas focusing on a wife who endures mistreatment and survives a coma, recovering to take revenge upon her cheating, greedy husband, his selfish mistress, and her evil mother in law.

Both are mini dramas in which strange, seemingly supernatural events are occurring in a country town during the Republican Era, with the leads trying to solve the mysteries.

Both are mini dramas in which strange, seemingly supernatural events are occurring in a country town during the Republican Era, with the leads trying to solve the mysteries.

Both are thriller stories with seemingly supernatural events in a country town during the Republican Era.