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Both are BL dramas with red flag love interests, toxic behaviour and love triangles. There is some mystery and guessing who is gonna finally be together or even get out alive. 4 Minutes is a Thai BL with a main couple and a side couple (with a love triangle) while Secret Relationships is a Korean BL with 3 guys chasing after 1.

While Si Jin has the element of redoing the past and a higher status/ wealthier family both dramas primarily highlight women's conflicts and struggles within the family. Elder women in both dramas are scheming and continuously hold down the female lead. Much more focus is on her story with the male lead being present but the narrative being told in her point of view most of the time.

Remakes .....

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Both are sexy marriage of convenience dramas. In both dramas they knew each other from school. .
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Nesses dois doramas temos o casal principal envolvido com crimes, Suspicious Partner é bem mais leve e tem muito mais humor, mas assim como em Flower of Evil temos assassinos muito bem escritos e crimes muito bem articulados. Assistir pelo romance também vale muito a pena, mas você tem que aguentar um pouco de sofrimento antes do final.

Romance e suspense na dose certa, Flower of Evil está níveis acima de When the Phone Rings por vários motivos, mas eu particularmente gostei de assistir os dois e eles me fizeram gostar mais desse tipo de dorama que envolve casos investigativos.

Accent is the short BL version of Korean and Japanese straight musical dramas, The characters are the same: super talented conventional pianist gets under the spell of a free spirited one. And then they fall in love but not before disclosing a teacher's manipulation.

Undercover High school drama is a good drama which has a similar vibe of Weak Hero Class 1.
It focuses on mystery, friendship, school bullying.

Both have the same author Salmon, part of the same megaseries 4 elements, and characters from the four series will interact on screen.

Both have the same author Salmon, part of the same megaseries 4 elements, and characters from the four series will interact on screen.

Both have the same author Salmon, part of the same megaseries 4 elements, and characters from the four series will interact on screen.

Both have the same author Salmon, part of the same megaseries 4 elements, and characters from the four series will interact on screen.

Both have the same author Salmon, part of the same megaseries 4 elements, and characters from the four series will interact on screen.

Both have the same author Salmon, part of the same megaseries 4 elements, and characters from the four series will interact on screen.

The documentary discusses about the real life serial killer, The raincoat killer
And this case inspired the crime thriller movie "The Chaser"