Recommendations

It gives me a similar vibe to the mouse in how both of the main leads are very similar in many ways.

The village and the gangs in the village who cause trouble and everything kind of gave me DOTS vibes, if you love A Tale Of A Thousand Stars, DOTS is a must watch.

Both is about a commoner rising to power and being loyal to only one woman.
Qing Qing Zi Jin, the male lead is an intelligent bandit leader while in Royal Highness the male lead is only a commoner scholar.
Both the dramas female lead only see the male lead and support to the end.
No Second Main lead syndrome (Lucky for that)
*There are a lot of similarities don't wanna put spoilers though.

They have similar vibe. If you liked Cambrian Period then you will like City Hunter as well..........
Do watch.

Both have fleshed out female protagonists who are not reliant on men; if a damsel is in distress another damsel will help her. Although Kakekomi is historical they share some similar themes

-Have an eccentric lead
-Both series have a character that specialize in almost everything
-Both series feature a senior that always suppress their junior (in a funny way)

Both main protagonists suffering from cancer can make contract with "devil" to get extra time to life. In If Cats Disappeared From the World can postman erase one thing from the world and then get extra day to life. In Doom at Your Service Tak Dong Kyung makes a contract with Myeol Mang for a hundred days to live how she wants, risking her everything.

both are adaptions of the same story.

Both are adaptions of the same story.

ITSAY also has a boy who is not sure about his feelings while the other boy is very open about his.

Same lead, full of action, great fight choreography and stunts.

An unexpected new relationship lead the main characters to rethink their values and life choices. A Bittersweet Life has more action scenes while Breathless is more raw.

Both very violent movies where the lead is trying to pursue their own way of justice. Save the Green Planet has some dark comedy elements.

The same idea of triads and a Romeo and Juliet type relationship. A daughter and son of opposing tribes are forced to be lovers. Will their love be fake, or real?

It's similar with Social Syndrome as it does also tackle the dark web and how dangerous the social world is.