Recommendations

Although not the same language but similar stories exept the male us richer one in legend of the blue sea and the female is the mermaid

It also has a teacher-student relationship where the teacher is an older woman who helps him with his studies and to gain confidence in himself

Both dramas are about corruption in the school system and the inequality that this creates between students.
However, My Strange Hero is much more romance centered than Solomon's Perjury which only has very minor romance in it, and I mean really minor.

Not really similar apart from the body switch if that's your thing, with the added humour of a gender swap as well. Plus, you know, the great Hyun Bin.

Strong bromance. Can you rely on your friends? There was a big crime needs to be solved. Will your friend there for you? There were some good time and bad time with the friendship

Grow up together. Strong friendship. There was a murder. Who did it. Can your trust your own friend? Could you work with your friend to solve the mystery?

The prosecutor working hard against the evil but was tiresome and went nowhere. Who is the real murderer? Who can he trust?

Could the prosecutor job secure by doing the right things? Could the prosecutor be framed and need gangster help? Could the gangster and the law enforcement work together?

Although the Japanese movie is not gangster, but one main lead make a plot to bring out the evil and seek revenge.

Can the cop or prosecutor work with gagster against the big evil!?what is the master plan? Will the gangster obey the law? Will they get along?

Can the gagster work with the cop to fight the evil? Can the evil abide by the rules of law? Can the cop twist the law to make room for the gagster?

Can you trust gangster? Can gangster turn into protagonist? Can gangster follow the law and work with prosecutor?

The successful prosecutor were framed and went downhill hit the bottom. Attempting to get up and search for justice

Friends or enemy? Can you trust your friends? How about trust snd work with gagster? Should the justice be served under all cause?

Who can be trust who can’t. There is a murder but who is the killer? Could it be your close friend?