Both of these movies have an extremely similar feel and mood to them; they're both depressing movies and moderately bloody (moderate in comparison to even more gruesome movies I mean, if you don't like the sight of blood at all don't watch either). Both revolve around children being raised as killers, but whom rebel against their "parents".
Kim Go Eun and Yeo Jin Goo are both excellent (as are the rest of the casts) but them being able to balance their roles as killers, yet still hold sympathy gets you emotional. They are both dark movies and in most ways predictable yet still thrilling. They mostly feel like the same movie to me, but genders reversed though Hwayi does have more of a deeper storyline.
Kim Go Eun and Yeo Jin Goo are both excellent (as are the rest of the casts) but them being able to balance their roles as killers, yet still hold sympathy gets you emotional. They are both dark movies and in most ways predictable yet still thrilling. They mostly feel like the same movie to me, but genders reversed though Hwayi does have more of a deeper storyline.
Both equally tragic and action oriented although Hwayi is more sinister from the start. Heavy bromances and messed up characters trying to fight their love for a messed up family. In Hwayi it's the family that kidnapped the main lead and raised him to be a monster. In Secretly the two spies act like parents toward the younger kid, even though he's a trigger happy north korean spy raised to be a monster. It's heartbreaking to see them love each other and also be forced to destroy one another.