Recommendations

One character has a secret which makes them care even more for the other character in question. Another light, cute and fluffy BL with a happy ending.

Fullmetal Alchemist: Final transmutation is the second part of Fullmetal Alchemist: Revenge Scar which in turn is a sequel to the 2017 movie Fullmetal Alchemist. All the three are based on the events of the manga 'Fullmetal Alchemist' written by Arakawa Hiromu.

Fullmetal Alchemist: Revenge Scar is the sequel to the 2017 movie Fullmetal Alchemist. Following the events of the first movie, the second movie is the continuation of the story based on the manga 'Fullmetal Alchemist' (Japanese : Haganeno Rinkinjitsushi) written by the renowned mangaka, Hiromu Arakawa.

Both dramas tackle a darker theme, crazy gripping action scenes, will have you on the edge of your seat at all times, a believable romance that is not the main plot line, and REALLY GOOD ACTING.

Both have Contract Relationships
The ML is rich while the FL isn't
Both had an incident occur which lead to them to temporarily maintain a contract cooperative marriage relationship.
Zhao Shu Zhen plays the grandmother to both ML's

Both tokusatsu show revolve around the villains trying to get a kind of energy from a source (the Enetron for Go-Busters and Victorium for Ginga S) in order to power up the big bad of their respective series. A special defense team is set to combat these threats.

Both are detective style drama. One to find out the death of his mother while the other to solve the mystery of the death of his master. Both also deal with forensic doctors and police .

-They both have similar female leads.
-They start living together with F lead's efforts for their marriage.
-There is a side female role like the doctor in it's okay to be okay.
-Both female leads are rich and generous

Go Se Won stars in both dramas? Both dramas are over 100 episodes. A family drama about a woman who is hurt by love, striving for small happiness and realizing the preciousness of family.

Both feature time slip time travel where ML and FL can travel to each other's time, subtly influencing and changing events.

Short length dramas (film vs. short series) featuring a love story, time travel, and changing fate.
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Short length (film vs. short drama) love stories where the main couple are brought together by time travel, and changing past events.

Both are short (film vs. movie length) dramas featuring time travel, and changing past events for the future. Both have open, but satisfying endings.

Both are Chinese dramas with a love story based upon time travel and changing fate.
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Both are subtly romantic stories featuring unusual forms of time travel (time slip vs. time loop) where the FL and ML must work together to change fate.