When I Was the Most Beautiful (2020)

The racing sport does form the background. Along with that the painful pasts of both the ML and the FL.
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Two brothers fall in love with the same woman.
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Another Ha Seok Jin drama with a love triangle with his brother. And the female lead is his younger brother teacher

A love story between student and teacher ........................................................................................................................................

both younger male lead, older female lead, both student/teacher relationship, both male lead fall in love first.

both are character dramas and somehow have similar vibes, with specific atmospher which catches you and makes feel you are there.
in both drama characters, their relationships and love triangles are raw realistic and deep, both drama has FL who loves art (music/sculpture) very much, wants to learn and success, and while going for that goal she gets in love triangle / falls in love (not only one time as it is usual for Kdrama FLs). But FL is not main similarity, the whole vibes, production, characters depth and storytalling style is similar.
P.S. in both drama there are great classic music soundtracks.

While When I Was the Most Beautiful is not a revenge drama, quite a few of its aspects reminded me of A Love To Kill. Both dramas have a very beautiful cinematography. They also have a very similar main theme -- they both tell a story about two brothers who fall in love with the same woman. Both are emotional and a bit slow-paced, so I think if you enjoyed one, you might enjoy the other, too.

Both are melodramas with the premise of two brothers liking the same woman, family matters creating havoc, money powerful second female lead, tragedy with long years apart.

* The female lead is an artist
* ML is a moto racer
* Friendship shaked because a woman
* Romance
* First Love
* Male lead who is ruthless in the pursuit of what he desires.

Similar Plot,
In WIWTMB two brothers fall in love for the same woman
In AS two girls that are best friends fall in love with the same man

In both, there's a married couple and forbidden love scenario

Both of them have not so good endings.

If you like one, you'll love the other one. since it's out of ordinary love stories.

Both stories about two brothers fall in love with the same woman.

In both, there's a married couple and forbidden love scenario.

WIWTMB ending just maybe abiding by the society rules or something. But Addicted ending is kind of pushing the boundaries to have a good ending.

Addicted has veteran actor/ actress that had great chemistry worth every single minute to watch.

Addicted kind of mystery/ thriller as well with a good twist.