The tones of the shows are similar. There are violent themes and powerful female characters.Both stories feature persons with outstanding abilities who must keep them hidden from other people in order to defend themselves

Why does nobody recommend this drama?
Anyway, both films feature the same thing, and in the final scene, we can see the guest appearance of Izumi Shinichi.

Both have interesting backstories! There is ghost romance in both dramas! The mysteries of why they are ghosts and their attempts to regain their memories are central to both plays.