Flower of Evil (2020)

Both of these dramas center around a male lead with a lot of childhood trauma centered around abuse and the death of his step/father. Originally presented as cold and uncaring, it is revealed that he is extremely selfless, taking on the blame and guilt from the deeds of his family.

Kagami Tsutako has been obsessed with Ii Azami for 20 years. While stalking him one day, she encounters Ii Azami being hit by a car. When she discovers he has lost his memory as a result of the accident, she decides to claim they are lovers in order to fulfil her lifelong desire. As a result, as Tsutako repeatedly lies one after another they begin to increasingly escalate…

Both dramas are about husbands hiding their secrets from wives. They also include the theme of self-sacrifice for other person. However, "Recalled" doesn't focus on romance part.

I recommend this both drama because , Male lead and Female lead
try to solve problem
In one drama explosion and another student murder/suicide

Both have a married woman investigating a crime that may have ties to her husband. Both husbands are wearing masks of harmless innocence, happy go lucky, but they're hiding dark secrets.

Aizawa Naoya is happily married to his colleague Natsuna but faces temptation to cheat on his wife when a new employee Tachibana Noa joins his branch and seduces him repeatedly with all sorts of antics.

Adapted from the manga series "Anata Wa Watashi Ni Otosaretai" written by Miyaguchi Jun and illustrated by Umesuzu (??).

Both drama are about a Psychological criminal cases
Both dramas have a detective with close relationship to the suspect
Both dramas have trauma from childhood

Shoji Taishi is a new third-generation lawmaker who comes from a family of politicians and had a sheltered upbringing. The womanising and not particularly intelligent Taishi and his actress wife, Kurosawa Yui, who got her big break through a drama series, have been married for five years.
They act like a happily married couple for the sake of their work and public image, but their marriage has already broken down. Taishi and Yui barely have a conversation except when live streaming on social media and do not even see each other at home. Although they have grown disenchanted in their marriage, they cannot get divorced immediately due to pressure from their families and endorsement deals. The couple have no choice but to unite with the unshakeable goal of breaking up.

Going by the plot of the 2 dramas, they are not similar, but when I was watching Flower of Evil, I kept thinking how similar it is to Confession.. Later I found out that they have the same director and no wonder I felt that way.. Both are crime/suspense/thrillers but Flower of Evil has elements that can make you cry and it has romance as well.. Confession on the other hand does not have a romantic plot.. But both are very interesting to watch

1. The premise is kinda similar: Both Trolley's FL and FoE's ML have secret pasts. They're afraid if their significant other learned their pasts, it would affect their married life.
2. Both Trolley's ML and FoE's FL tries to protect their significant others in some way.

Just the feeling is where the secret is being held within a family. Though not the same story, that intrigued sensation all along is priceless. Also, teaches valuable morals. I loved them both mystery scary thriller genre.

A psychological drama about unhealthy interpersonal relationships explained often through elaborate flashbacks. Takanako Mayuko, who grew up in an idyllic mansion with the perfect loving family, blames her childhood best friend for everything that has gone wrong in her life. While maintaining the façade of friendship, Mayuko finalizes the revenge she’s been secretly plotting for decades.

well, so many people have given out recommendations and i am surprised that no one is yet to recommend Voice season 2 and 3 when the male lead character there is so similar to the one in Flower of Evil. in fact Voice series are OCN dramas so they are meant to be a lot darker and with less emphasis on romance which could be a plus for a genre like this. there is a good reason why the Voice series keep getting season's extension, you gotta watch it to know. enjoy!

Both male leads hide their dark sides behind a friendly facade. As the drama progresses that mask starts to slip.

Hear me out! the dads! + acting in both dramas is superb, the dialogue and how the screenwriter used timelines and flashbacks