Recommendations

Both are mini dramas
Both are "historical" but maid's revenge is not that far in the past
ML both start as "evil" but their true motives are explained later
Both have good chemistry
Both are about suffering and the FL trying to survive

The love-hate relationship reminded me of TTEOFM ... both dramas are in a "historical" setting and the chemistry is good

"Serendipity's Embrace" involves a storyline where the female lead (FL) ends up with the male lead (ML) despite the FL's best friend having a crush on the ML, it does share a thematic similarity with "20th Century Girl." In "20th Century Girl," the FL also deals with a complex love triangle involving her best friend and the ML.

They are both lesbian romance. The series talked about the challenges of lesbian in the olden days. While affair is modern. If you are a person that like lesbian romance series then I will advice you not miss out on this both series.

Both dramas have rural setting while also showcasing city life. In both drama couple are mature and loved each other in past both drama has ambitious femal lead

The main leads know each other from their childhood and meet each other again as adults. The FL in both dramas quit their job due to their circumstances after being a top student all their lives.

Both are Republican Era mini dramas in which the ML wrongfully believes the FL betrayed him, and he treats her viciously and cruelly as a result.

Both are Republican Era mini dramas in which the ML wrongfully believes the FL betrayed him and treats her cruelly, keeping her like a prisoner. There is a manipulative SFL who causes many issues. Both FLs become pregnant and miscarry. Both endings are ambiguous as to the ML's fate and the FL's future.

Both are Republican Era mini dramas with a love/hate relationship between the leads, one of whom is enacting revenge against the other for something they wrongfully believe they did.

Once again they have the same main actors as the main couple, once again their characters are somewhat similar. Especially Mean’s characters this time. Both Mean’s character Thiu from my dear gangster oppa and his character now are both involved in illegal activities mixed with obvious action and both characters have a hard time getting out of their bad habits. Pings characters are just usually similar no matter what he’s acting in (out of these two’s 3 BL’s) they are usually naive and see the world as non harmful to himself, they also can react strongly towards Mean’s characters.
This is their second BL which is pretty different from their first one.

They have the same main actors as the main couple. They also have the same vibe when it comes to their characters personalities (at least Ping’s characters) Both his character Nhai and his character now are both naive and not sure on things happening in their life.

Childhood friends
Gangsters
Animal lovers
Opposites Attract
Calm and Badass Male Lead
Gives the same vibe but in a different day dimension.

The shows both talk about men who are not afraid to step out of societal norms. Fashion is something that everyone can make their own and shouldn't be confined by gender roles.

in term of tone it is quite different as ka ni doro wo nuru has a bit of a darker undertone with the ex while Colorful love is a lot more goofy, but when I started this show it immediately reminded me of colorful love.

V3 is the series after the fist Kamen Rider and a direct sequel to it with the fist two riders showing up in the first episode.

Amazon is the series after X so if you want to watch the Kamen Rider seasons in order watch Amazon after X.