Recommendations

Similarities:
-- Thai mysteries
-- Centers on students
-- Catalyzed by the death of a student
-- Queer characters

Differences:
-- DFF is a horror/slasher
-- O!MS is a romantic-mystery

Similarities:
-- Thai BL mysteries
-- Supernatural elements
-- Catalyzed by the death of students
-- University romance

Differences:
-- UWMA doesn't feature ghosts, unless you count "ghosts" of the past
-- UWMA is definitely a bit of a tear-jerker, esp. compared to the bounciness of O!MS

Family focused ensemble dramas, longer formats.
Main couple divorces but finds their way back to each other. Their siblings also form a potential romance with each other (former in laws).

As soon as The Lament of Autumn started I was wondering why this story resonates so deeply in me? And I saw a clear connection with one of my all time favorite movie: Lust Caution.
Both stories are about a complicated relationship between a young woman, anti-imperialist, involved in theater and strong-minded; and on the other a cold soldier that has seen his share of horrors. Those two fight conflicting emotions, desire, repulsion, threat, fear. Their paths intertwined but differences values made them undeniably doomed. Those stories show the determination of young Chineses to fight power and oppose the system.

Both male leads with heart transplant and a monitoring watch, fall for a random woman who has the ability to stabilize the heartbeat "Charge Time"

They both have similarity like cheating and betrayal. But in this drama they do after marriage which is more toxic than A Love Other than Yours

It is the same plot by the same writer, but delves more into the dynamics of the home, particularly between the two women and the housemaid’s mental struggles

yeah so this isn't camp at all! and everyone is definitely straight. yep yep yep. also Oguri Shun is there

Similar in concept, a series of crimes ,a group of teenagers bullied a student to death, then searched for the the hidden avenger among them

Both The Blue Road and The Bridge feature murders that take place across two countries, leading to cross-border investigations. The Blue Road involves murders in South Korea and Japan, bringing together Korean and Japanese detectives, while The Bridge involves murders in Singapore and Malaysia, bringing together Singaporean and Malaysian detectives.

In both dramas, you have two leads that start to work together. They have different personalities but have to work together to solve an issue.
The leads eventually develop some sort of relationship/bromance.
The story also seems to be a race against time or the clock to avoid disaster.

If you loved Delusion, you should definitely check out Hide & Sis for its dark family secrets driven by manipulative parents and crime scenes hit terrifyingly close to home, taking place right next to the characters' living areas.

It is similar in the sense that the mother daughter have a complex relationship, the fl going through hardship ml backing her etc
From a general family, similar politic, scheming second house who results in the fl being lowkey abandoned by her mother then in her return her mother still doesn't like her (which is kinda similar)

Both are miniseries that follow a similar storyline: after the empress dies under mysterious circumstances, she wakes up in another person's body and tries to uncover the truth behind her death.

Same premise where female lead is obsessed with the ML and thinks she is his FL.
She falls literally into the ML world but it is not the real world but one of fiction.