Recommendations

Same concept! FL transformation with help of ML.
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"A psychic, a Catholic priest, and a detective team up to fight crimes caused by supernatural forces.“

Both fight an evil power and have seggsy ass female characters

THE BROMANCE is attractive just like The Devil Judge. The Merciless' main character is also well written he is not like Ga On. I think Ga On's character is not developing much throughout the series.
Also you'll like this if you like Vincenzo too.

both FL in the dramas are younger than the ML, naughty, stubborn and strong.. ML in the MLSC is chief of forest or something like that, while ML in MY SECRET BRIDE is a lieutenant..

the FL in both drama are clever, independent, know all about forest.. they both are naughty and hard to listen to other people.. but, actually they have good intention to the nature and people..

-Both are Tsutsumi Yukihiko works. Expect a lot of slapsticks, 60's-90's pop culture reference, amazing score, and unique cinematography.
-Yamegoku is basically Keizoku/SPEC, but without the element of weirdness.
-Both drama feature Kitamura Kazuki as a cop dressed and act like a Yakuza.

They are both the same "mystery" kind of drama. They are kinda similar with the antagonist wherein they want to take advantage of the ability of the FL.

Both starring the amazing Nikaido Fumi as the muse of a novelist that leads to their downfall. Artsy cinematography. A mixture of imagination and reality. Aims to mature audience.

BLACKPINK Summer Diary in Hawaii is the first in the BLACKPINK Summer Diaries. The Hawaii Diary was released in 2019 and was filmed in Hawaii, like the name suggests.

BLACKPINK Summer Diary in Seoul is the prequel to BLACKPINK Summer Diary in Everland. However, the Seoul version released in 2020 and the Blackpink members filmed this diary in Seoul, Korea.

I think personality traits of female lead and male lead are similar in both dramas and the type of industry they work in. Male characters come off as very cold and strict with everything around them and it starts to change towards the end. Female leads are silly and bold. Both are slow burn romances

Shen Yi Yi lives in the city and has excellent cooking skills. When she was young, she was friends with Shen Die Yi. Die Yi abruptly dies of a cough and her life remains a mystery. In order to repay her friendship with Die Yi, Yi Yi poses as Die Yi and heads to Chang’an Lu Xing to fulfill the marriage contract. As well, she wants to find out the truth behind Die Yi’s life. In order to delay the marriage, Yi Yi dresses up like a man and enters the Shangyi Guan alongside with Die Yi’s fiancé, Tang Jiu Hua. They also meet Yang Zi An who was ordered by the emperor to hide his identity and enter Shangyi Guan. Together, Shen Yi Yi, Yang Zi An, Tang Jiu Hua, second prince Li Xin Yuan and swordsman Du Gu Mu Xue solve many strange cases. They face the embassy of the East Kingdom, and form the “five sons of Shangyi Guan”, becoming famous in all of Chang’an. Together, the five must ride out the difficulties and bring peace to the kingdom.

Hong Ra On disguises herself as a man and counsels men on dating. Due to a love letter she wrote for a client, she meets Crown Prince Hyo Myeong. Ra On is unaware that he is the Crown Prince and Hyo Myeong is unaware that Ra On is a woman. The Crown Prince becomes interested in Ra On. His eunuchs become aware of this and attempt to get Ra On to become one of them.

Mu Jue Chen is the Qian Mu Mountain Pavilion's Young Master. Dashingly handsome, exceptionally clever, and skilled in the martial arts, he is beloved by his subjects. Unfortunately, he is also exceptionally arrogant and self-obsessed.
His long-suffering assistant Qian Yu, is a young woman who was abandoned at the pavilion as a baby. She has been Mu Jue Chen’s loyal foil for ten years, but after a year of putting up with his quirks, she has had enough. Upon discovering her true identity, she is relieved that she no longer has to be Mu Jue Chen’s footstool, and resolves to leave him forever.
Of course, Mu Jue Chen 'suddenly' admits to himself that his feelings for Qian Yu just might be deeper than he first thought. Actually, there just would be no living without her! Now, how to convince Qian Yu that they really do belong together? Can Mu Jue Chen truly come down off of his high horse and prove he can change?

Hua Rong is about to set sail on a heroic adventure she’s often dreamt about, only to be kidnapped by the notorious pirate, Qin Shang Cheng, who is set on making her his bride, willing or not. After many failed attempts, Rong successfully flees her island prison and its sea monster.
She then encounters the young prince, Jin Yi Wen, who falls for her at first sight. Meanwhile, Shang Cheng, equally smitten with Rong, is fast on her trail, vowing to recapture his lost treasure.
(Source: Lee C at MyDramaList)