RedMapple

Similar "dark vibes" with unhinged characters. A drama that delves into dark psychology. FL leads have a bit of a similar vibe where both give off this look as if you're staring into the pits of darkness and they know your deeest secrets. Hyper Knife's FL is more unhinged though, whereas Doubt's is more meticulous and not as outwardly unhinged (though both show their rebelious sides and are arrogant in the way they do things their own way).

Similar "dark vibes" with unhinged characters. A drama that delves into dark psychology. Both involve killers and neurosurgery just puts emphasis on different things. Mouse is more focused on crime/detective work whereas Hyper Knife focuses on both neurosurgery and crime.

In terms of the leads dynamics and the premise (school, sports) I think these two are very similar to each other.

Also, both tug at heartstrings.

Darkness and emotional investment. Both stories have protagonists fighting against the injustice while morality of the methods used are in the gray area. Both series have a strong sense of comraderie/bromance where the guys take care and protect each other.

There is this subtle romance between the two main leads that makes me think of both the dramas. Also, the melancholy of the story which that subtle romance springs to life.

Definitely a slow burn on both ends but the connection between the leads is undeniable.

Both have the same screenwritter so you can expect a thrilling mystery and subtle yet deep romance. While one deals with memories and the other with time travel, both addresses the hardship of 'knowing too much' than an ordinary person and the pain of having to carry that with you.

They have a similar Vibe. If you're looking for something with the same kind of premise, this probably isn't it, but if you felt touched by how the story was told and what feeling it left you with, I'd say these two feel similar to me, to be watched side by side or one after another.