Every Genre Challenge

Action (main dude is a delinquent who often gets into fights)

Action *short (main dude is a blade wielder and seals evil black ash via fighting them)

Action (main dude learns martial arts and swordsmanship)

Adventure (main dude travels to various places to find an antidote to a poison)

Adventure *short (main dudes are campers and solving cases while traveling)

Adventure (???)

Animal (main dude is a samurai who begins to raise a cat)

Animal *short (main dude is a shapeshifter that turns into a dog)

Animal (???)

Business (main dude is an accountant trying to embezzle money from a big company)

Business *short (main lady is the CEO of a company)

Comedy (main dude often wears silly and unbelievable disguises whilst solving crimes)

Comedy *short (has a silly plot where the main dude is in love with his doll)

Comedy (has a silly plot in which a gangster and bullied teen swap bodies)

Crime (main dude blackmails the main lady to help him solve crimes illegally)

Crime *short (main lady is heavily involved in crime as she is a drug dealer)

Crime (main dude is trying to prevent a crime (murder) via time travel)

Detective (main dude is a detective helped by a traffic cop)

Detective *short (main lady is a detective assisted by highschoolers)

Documentary

Drama (lead lady is a hardworking single mother who may be the target of a serial killer)

Drama *short (main lady is an orphan, poor, being thrown out of her house and raising her sister)

Drama (main dudes are closeted and secretly dating)

Family (about a family-owned tailor shop and the family politics surrounding it)

Family *short (main dude meets and bonds with two brothers that are many years apart in age)

Family (main lady is a mother trying to connect with her rebellious daughter)

Fantasy (main dude is a father who turns into his 18 year old self)

Fantasy *short (main dude is a comic book character who has come to life)

Fantasy (main lady is a mermaid who snuck into the human world)

Food *short (lead man is a chef and lead lady loves eating food)

Friendship *short (show various relationships between 5 highschool friends)

Historical (leads are in the Chinese Republican Era)

Historical *short (main dude is transported into the Joseon era)

Horror (main dude begins working at a museum and horror scenarios begin to happen)

Horror *short (main dude works at a customer call centre where horror scenarios happen)

Horror (main dude begins dating a murderer which leads to horror elements)

Investigation *short (leads are investigating supernatural based suicide cases)

Law *short (main dude is a judge)

Life (both leads are trying to figure out what to do with their lives)

Life *short (follows the lives of 5 restaurant workers)

Life (follows the lives of 2 highschoolers and their conversations)

Manga (adapted from a manga and leads work for a weekly manga magazine)

Manga *short (adapted from a manga)

Manga (adapted from a manga, plus the main dude likes manga and is in a manga club)

Martial Arts (mains fight using martial arts)

Martial Arts *short (main dudes are high schoolers who are skilled in judo)

Martial Arts (main ladies are in a naginata (Japanese blade) club)

Mature *short (main dude falls in love with a love hotel employee)

Medical (leads are radiologists and work in a hospital) 

Medical *short (main lady's family are in the medical field and the main dude is a doctor)

Medical (leads are students in the veterinary department)

Melodrama *short (follows various dramatic romances - one-sided love, affairs, break-ups, etc.)

Military (mains are all soldiers in Japan's Ground Self-Defense Force)

Music (all main leads play the violin)

Music *short (leads are highschoolers who form a band to compete in a competition)

Music (leads are in a police musical band)

Mystery (main dudes are unravelling a suspicious suicide and disappearance case)

Mystery *short (leads work as private detectives solving cases in an episodic format)

Political *short (main lady is the daughter of the prime minister)

Psychological *short (about the relationship between a kidnapper and the person they kidnapped)

Psychological (main lady uses psychological mind games whilst gambling)

Romance (main lady is pursued romantically by a student, cousin and an old classmate)

Romance *short (tomboy lead lady tricks her rival in a girly appearance which leads to romance)

Romance (main lady lies about her identity to her step sibling which leads to romance)

School (main lady is an adult high school dropout currently attending high school)

School *short (leads are elementary school friends who reunite in high school)

School (main lady was bullied in elementary and now is attending high school)

Sci-Fi (leads are altering time to prevent the kidnapping and death of a child)

Sci-Fi *short (leads are delivery people who find aliens)

Sci-Fi (lead lady is a humanoid robot with a conciousness)

Sitcom (6 dudes with the same name getting into shenanigans thanks to phobias)

Sitcom *short (5 people live in the same house and shenanigans happen)

Sitcom (???)

MDL doesn't use the sitcom tag for movies so the next best was a comedy with multiple mains.

Sports (all the leads are go players)

Sports *short (main dudes are highschoolers in a football club)

Sports (main ladies are rivals who compete using kendo)

Supernatural (main dudes can see ghosts)

Supernatural *short (main dude is a cursed God who lives on Earth)

Supernatural (main dude can read minds)

Suspense *short (main dude has mysterious paranormal events happening around him)

Thriller *short (thriller elements happen as the main lady tries to prevent a suicide)

Thriller (main dude lives a thrilling double life of a banker and serial killer)

Tokusatsu (main dude is a superhero that fights CGI monsters)

Tokusatsu *short (???)

Tragedy *short (main dude has stomach cancer)

Tragedy (main dude is told he'll die of an a illness before his 20's)

Vampire (main dude is a trying to become a fully-fledged and matured vampire)

Vampire *short (main dude is a vampire who is about to die)

Vampire (main dude has an immunity to vampires)

War *short (main lady is a spy of a rebellion group tasked to take a defense map)

Western (main dude is a cowboy from USA)

Western *short (main dude wants to go to America and become a cowboy)

This is a special, not a web series or short-length series, but I made an exception as I found it hella difficult to find anything Western-related that was also web series/short-length series size.

Western (plot parodies common Western movie tropes)

Wuxia (mains are a devil and a fairy in a world of immortals)

Wuxia *short (lead ladies are cultivators who can use fantasy powers)

Youth (all the mains are high school students)

Youth *short (lead dudes are both university students)

Youth (lead lady is jobless and obsessed with jellyfish)

Zombies (leads are fighting a dark smoke that causes zombie-like side effects)

Zombies *short (???)