The Sign

- main characters are in the police force
- "hot" and "cool" main leads that complement each other
- mystery cases

- main leads are related to the mythical creature naga (one is naga, the BL one is reincarnation of naga)
- characters are related to mythical beings of naga and garuda
- main leads didn't remember their past lives in the beginning of the series
- third-wheel from the past

The main leads are polar opposites. Both main leads in "Killer and Healer" and "The Sign" have opposite personalities that complement each other well.

both ancestral creatures in their past lives, which causes them to meet in this life for reasons of destiny but also causes problems for them.

The Sign Special Episode Encore is similar to The Sign in its continuation of the original story's themes and character development. Both feature the complex relationship between Donato and Alexei, exploring their emotional depths and intense chemistry. The Encore episode expands on their journey, delving deeper into their struggles and passions. The same intense drama, suspense, and romance that defined The Sign are present in the special episode, making it a seamless extension of the original narrative. Fans of The Sign will find more of what they loved in this encore presentation.

both have relation of reincarnation / past life
both have regrets/struggles in their past life
both shows they have dreams about their lives.