Recommendations

I watch the both of the dramas and its very similar by helping a person in their darkness days and be able to conquer it the leads became their shoulders when they feel lonely. Every characters in two dramas are lonely and in pain because of family problems, missing their love ones and being traumatize from the past, I recommend you to watch both of the dramas

There both have the vibes of a same theme where Hotel Del Luna we all know a woman from the past who commited a sin and the punishment is to live more than 3000 years if I remember? its 3000 or more or less? and she was brought in the living world to help those dead people with their grudges in human beings while on the other hand Mystic Pop Up Bar is similar by in the past specifically in joseon era where the female lead commited a sin and that is she killed 100,000 people including her baby inside her womb not realizing she is pregnant and killed the sacred tree and to reincarnate she was delivered in the living realm to help the people who are in grudge and a special case helped her in her journey to reach 100,000

Both dramas revolve around modern, working women and issues they are facing in their love/family lives, including infidelity.

Both depict a mother and son with a strained relationship that turns incestuous.

Both depict extreme cases of a teenage boy being bullied by his classmates. No one helps or believes them, and even their own mothers abuse them from time to time.

Both depict quiet teenage boys who struggle with loneliness and survival.

The tone of the drama is similar. Few words are repeatedly used by the main leads in all the episodes. Both dramas doesn't proceed in the way you expect it to be.

As "That's Cunning! Shijo Saidai no Sakusen", "Bad Genius" is a film about cheating in exams to achieve a goal.
In the first one, the goal is to protect their dorm. In "Bad Genius" the goal is to complete the task in order to receive money.

Both of them are about people cheating in exams, Although they don't have the same motivation or objective to cheat.

Both feature a main character that faces (potential) discrimination because of their social background--burakumin in Japan and baekjong in Korea.

Both dramas are heartwarming and heartbreaking as the main character overcomes adversities with the help of cell mates while in prison

both are focused on the draft day where 21 year old males participate in a lottery that determines wether they have to join the military or not. Theyre also both lgbt themed and directed by Josh Kim

Both stories are about three working women in Shanghai turning thirty and having problems in both their love lives and careers.

Both are about a young boy struggling to survive without parents.

* female leads are divorced
* female leads wants the custody of their child so do a 24/7 job
* female leads are older than the male leads
* female leads are employees of males leads