Time Between Dog and Wolf (2007)

It's also about a Men going undercover. Then through a accident, he also lose his memories and thinks he is one of the gangsters.

Both main male leads are the self-sacrificing sort that have more lives than a cat, both are in love with a childhood fried who is the source of at least half of their troubles.

The action scenes, the mystery, the actors, the writing, and the character development. All excellent. It's a roller coaster ride of emotions.

They have the same main actor, the handsome and talented Lee Jun Ki, and almost the same feeling.

Both male characters are on opposing forces.One in the Mafia clan and the other in police department.

They both love the same woman.

Both stories are much Mafia related,where the leading males have close bond with their Mafia bosses.

There are two opposite forces.

Both are gangster stories.

The Male lead is a Anti-hero

Both Male-leads are tortured

Both Male-leads find love at the darkest time

Both have a similar plot where the death of someone close to them causes the main characters to seek revenge. As the story progresses, the characters begin to learn more about the past and the events behind their loved one's death, and the only people they can trust are each other.

They both have somewhat similar plot about a cop doing an undercover work in a triad. Both also gave me some sorta same feeling and both are great movies filled with action.

I recommend this both drama because , Male lead and Female lead
try to solve problem
In one drama explosion and another student murder/suicide

In both, you have the subject of NIS agents going undercover. You also have a love story in both. TBDW is more serious and dramatic than 7th Grade, which is more built like a romantic comedy.

They are similar in the "secret" spy like stuff.. Both are full of action and suspense.