In both dramas, the male lead was raised in the wilderness by Wolves. They are later on introduced to civilization and fall for the female lead who showed him kindness and compassion.

If you want to feel the same 90’s nostalgia from “Analog Squad”, then you should definitely watch Reply 1997.

Both dramas have a very similar plot. The only difference here is the target of the main character’s next target.

Both dramas have a similar concept. Both main characters use a device to contact a person from another time. In Kairos, it is a person from the future whereas in Signal it is a person from the past.

Both of the main characters decided to adopt a new identity and embrace western culture. Also, both characters use guns... a lot. I guess those are the things that make both dramas similar.