Melodramas about two strangers from different countries. Both halves of the leads are from Japan. Both have a similar aesthetic. Granted, I don't think this one will be as sad as 18x2 but romance-wise this is it.
There are gonna be shows that are similar plot-wise but VIBE wise this is what this reminds me of. Extremely suspenseful shows with great casting and captivating mysteries. I'd label them "classics" in the kdrama thriller genre. If you enjoy titles like: "Save Me", "Memories of Murder", shoot- even "True Detective Season 1", and dislike shows that drag, have classic kdrama unrealism, or treat their audience like idiots. YOU WILL LOVE THIS SHOW.