I f you liked the romance in Goblin then I think Cinderella and the four knights would be something you'd enjoy.
- cinderella esk story line
- age gap ( not as apparent in CATFK as in Goblin thank god)
- charming side characters
- cute side couple you can root for

overall while watching Goblin I couldn't stop thinking about Cinderella and the four knights.

Similar vibes. Both romances are between a prince and someone who works in the palace so its a similar dynamic there and comes with similar conflicts.