Age of Legends (2018)

Amnesia, undercover work, and drug wars are some of the major similarities. The two shows are both action romance, although, I would say "Age of Legends" is more light-hearted.

-both male lead goes undercover
-lots of action
-drug cartels and crimes


-age of legends has more romance

Lot of similarities
>> Drugs Mafia
>>Both fathers if FL goes undercover and dies
>>ML has some connection to death of Fl fathers

Same feeling for me, story is different but if you like action/crime with a little romance than you will like this one as well.
Bonus is that they have the same FL.

- William Chan is the main lead
- It has action, suspense, and romance.
- Police related and underground black market gangs

It is worth watching if you like this type of genre-related type of drama!

Both tackle the idea of undercover cops in criminal organisations, but end up becoming brothers with the criminal they're spying on.

Synopsis is pretty similar. Police man (or police related man in Age of Legends) goes undercover in a criminal organisation, gathers information, loses memories and the only evidence is in their memories.

Both are action romances. The male leads leave their countries and spend years in overseas drug cartels because someone close to them becomes high level drug lords (adoptive father in City Hunter and sworn brother in Age of Legends). They learn to fight and become overall badasses, and see pictures/hear stories about the female leads back in their home countries. When they finally come back to their own countries years later, they cross paths with female leads and romance ensues (after butting heads with each other at first). Both female leads are action girls. The female lead in City Hunter works in the secret service (president's bodyguard) while the female lead in Age of Heroes is a police officer. The main plot in both revolves around bringing powerful people to justice.

-Both the main leads are in undercover mission.
-Both the dramas is about taking down drug mafias.
-Both the leads work undercover.
-Both have dramas have romance involved (less in NSG)
-NSG is more about drug mafias connection.

The male protagonists are basically great at fighting, investigating and acts like pro agent. Although in the Age of Legends the female lead is badass, their chemistry is almost the same and very beautiful. In both dramas, there are missions and undercovers and lots of action, so it has a similar vibe.
Both male leads are also hot as heck as well as the female leads. It also involves drama and issues with the family of the other lead, such as murder or something uncovered.
In both dramas, there is a beautiful relationship and friendship as well.
You will love it.