"To.Two" and "Pyramid Game" have different plots, but they have similar concept about social hierarchy in school where the students are divided with barriers that gives them conflict with each other and shows various problems in school due to it. "To.Two" uses tickets for a social media app while "Pyramid Game" uses popularity poll for a ranking system.
"Missing 9" and "Castaway Diva" have different plots and genres, but they have similar concept about people being stuck in a deserted island. Both dramas shows the survival of the characters and how they went back to adjust in the society. It also focuses on the entertainment industry with celebrities.
"Pied Piper" and "The Killing Vote" are thriller dramas with similar concept where there's an organized mastermind behind the crime cases that's creating a nationwide problem. "Pied Piper" has Pied Piper who helps the victims take their revenge by doing terror acts, while "The Killing Vote" has Dog Mask who executes the criminals with the help of the victims. Both are being considered as modern Robin Hood.
"Hit the Top" and "Twinkling Watermelon" have the same time travel concept where the son/father goes in the past/future where they meet each other. It has 90s vibes, family, friendship and the male leads are similar for being passionate about music.
"Moving" and "Unexpected Heroes" have the same main characters where 3 highschoolers with different kinds of superpowers go to the same school, along with some revelation and case they deal on their way. Although "Unexpected Heroes" is just a short webdrama with the purpose of organ donation awareness.
"Moving" and "When Time Stopped" are dramas with similar plot about people with different kinds of superpowers being chased by organizations who wants them gone. In "Moving", there's a little part of a boy with time stopping ability, so if you're interested to see more of this ability, watch "When Time Stopped" where the male lead has the ability to stop time and he takes advantage of it by doing missions.
Both movies are about nostalgic first love. "Unforgettable" is a small budget indie movie set in an island that is more on drama side, while "20th Century Girl" is a Netflix original movie set in a school that is more on romcom side. Both movies similarly takes place in the 90s, includes radio/broadcasting job and have a tragic ending. With friendship and bittersweet romance which are dearly remembered even after they grew up as adults.
"Save the Green Planet" and "Glitch" are about aliens with quirky main characters and takes on a dark route. The aliens are experimenting on humans and it makes you question what/who is real or fake.
"Save the Green Plant" and "The Night of the Undead" are movies with similar plot about aliens who disguises as humans and the people are trying to kill them. It's funny, weird, crazy, dark, full of twists. Such a wild ride, don't think too much and just enjoy (or prepare to be uncomfortable) while watching it.
"Will You Be There" and "Be With You" are beautiful and heartwarming time travel romance. Both movies have exactly the same vibes. It feels nostalgic and tender. It showed each years of their timelines and the growth of the characters, and it makes you realize that every moments can be spent happily and you should always cherish your loved ones no matter what the outcome of your future is.
"Definitely Not Today" and "Hoshi to Lemon no Heya" tackles about sensitive topics of adults who have long term social anxiety and depression since they were in highschool which turned them into loner and withdrawn. They later found someone who are also struggling like them and grew their bond that impacted their lives. But both dramas have a different plot and vibes. The characters' interactions are opposite - meeting by chance and communicating on internet.