This was a light, easy watch (as others have pointed out) I was a little irritated with the direction they went in the ending, episode 14-15 were meh. The premise was really interesting, but I don't think they delivered on it.
I would not say it's 'heavy' not like Stranger, I mean it follows the typical top level corruption that's a pretty common. The center piece of the story it more like a redemption arc, and the two working together. It's not nearly as dark as some of the others I've watched.
Really liked this, watch a lot of the 'buddy cop' drama's and this one was my favourite so far. They actually liked each other and worked together. Both mains did a fantastic job loved it.
Finished this a couple days ago and I keep thinking about it. I’m a sucker for a time travel trope, and I’ve seen Tunnel as well. This one I thought was more of an emotional gut punch, Jo Jin Woong stole the show on this one for me, and I’m a huge Lee Je Hoon fan. The story though, my heart kept breaking for Jae Han, he did so much and tried so hard. Solid emotional gut punch. Highly recommend this and Tunnel for a different take on the time travel.