Recommendations

Time loop

Has a similar vibe, reflective of life, mature feel and strong female leads with some romance. Both are an enjoyable watch and slice of life for women in their 30's.

Both are thrillers
-Both have a revenge plot
-Both FLs are ruthless and cold
-Both FLs are vengeful
-Both FLs are "masterminds"/calculated
-Both have Sociopath Female Leads.

Both female characters are strong, independent and badass, they manipulate to get revenge and punish who wronged them and strategically takes them down and unraveling secrets on the way. They are both thriller and crime dramas with psychological elements.

Both dramas are psychological thrillers touching on themes of manipulating people, with a mysterious female character with similar plot twists.

[Rampant] is a story about a zombie outbreak set in ancient times. Similar to [I, Kill], the protagonists struggle to survive while pursuing their individual goals and protecting their loved ones.

Both are zombie dramas set in ancient times, with [Kingdom] taking place during Korea's Joseon era. The female lead in [I, Kill] is reminiscent of the one in the Korean drama, as both characters serve as assistants to a doctor in a remote village.

[Kingdom Season 2] concentrates more on the struggles of the living inside the castle in Hanyang city when another outbreak spreads. To protect innocent citizens, the crown prince and his allies risk their lives once again, facing not only the undead but also the court's political conflicts.

Both are zombie dramas set in ancient eras, with [Kingdom] set in Korea's Joseon era. The female lead of [I, Kill] is similar to the one in the Korean drama, as both work as assistants to a doctor in a remote village. [Kingdom] focuses more on the male lead, the Crown Prince, while the Japanese drama's main female lead is a former ninja.

Both FLs are quest driven sole survivors who have died/nearly die. Both have a magical lamp that gathers spirits. Both MLs hold a secret, either their identity or goal, from the FL as they assist her. Both dramas have characters who are the spirit/wick of the lamp in human form.

Both tell stories about family and its problems, then finding happiness. There are stories of fathers and children, as well as stories between siblings.

Both dramas have similar vibes. Going to a parallel universe/in the past and changing a character's life path.

Both are stories centered around SA, how family members influence the decision of whether or not to report, stigma, corruption by those in position of power, and the emotional toll of it all. The MLs seek vigilante style justice in their own hands from the offenders and serve time for their acts. The FLs demonstrate both despair and resiliency, ultimately relocating to rebuild their life.

Both has huge flaws but you watch it anyway.

Fantasy-driven romance
Both use fantastical premises to kickstart relationships that wouldn’t happen in ordinary life.

Contractual / conditional relationships
Each story begins with a deal or condition rather than pure romance, then evolves into genuine feelings.

Comedy mixed with emotional depth
Both dramas start lighthearted, with culture shock or magical hijinks.
As the story progresses, they shift into heavier themes of destiny, sacrifice, and emotional struggle.

Themes of fate and inevitability
Both ask: Is love a choice, or is it bound by fate?

Fantasy romance core
Both dramas hinge on extraordinary circumstances that test whether love can transcend time.
Dual timelines / past influencing present

Rom-com start, heavier turn later
Midway, they shift into frustration, tragedy, or suspense, showing the cost of destiny.

Themes of fate and inevitability
Characters wrestle with whether love is pre-ordained or a choice.

Both dramas ask: Can love survive across lifetimes or centuries?

a lot of action scenes, murderers, seeking revenge. although kil bok soon is a movie, both contain action + darker side of crime