Korean Drama " A Superior Day" was too boring for a thriller.

Right from the start, the story gets predictable, with frustrating situations, especially since the viewer can easily figure out what was happening when the characters just played it ignorant. And even though there was some suspense at first, things started being repeated, particularly the twists. The gore, moreover, was sometimes unnecessary and only there to provoke.

On the other hand, the performances were nice and enjoyable, primarily from the main leads.

So, overall, 3 out of 10.