Recommendations

They are both projects that are full of suspense and also contain the genre "crime and mystery".
The main characters from "You Are My Spring" both have a painful past and they are both growing up trying to cope and heal, one of the "antidotes" is companionship, trust, and love.

In "Flower of Evil" the main male character also has a painful past and secrets, and his story also develops in such a way in which he learns about trust, he learns what it means to truly connect to someone and how unconditional love works.

Both projects also contain a hint of romance, and the general feel/vibe of both series it's similar, they also have interesting twists and surprising story developement.

- In both dramas Seoulite have to move to countryside due to personal issues.
-Countryside's people in both dramas are funny and entertaining.

** PLEASE NOTE THIS CONTAINS A HUGE SPOILER (or two) **

- Both contain leads that struggle with ethics/following the law
- In both dramas, a character attempts to split up the couple
- Both involve orphans
- The leads know each other from childhood (but have forgotten for most parts)
- They both have a very similar ending

In both drama the main leads start communicating with each other through an object but living in different timeline. In Il Mare it's trough a Mailbox, while in Toki no Kaori it's via ham radio.

Toki No Kaoiri is the Japanese remake of Korean movie Ditto. Leads from different timelines communicate through a ham radio.

An entirely different story/plot has similar thrill and suspense vibes. Both are quite comedic and quite psychological themes.

The cast start as dating couples in CD and friend couples in L&J.
They go on dates with the others, change their dates too.
In CD, couples try to find if they r still in love with their partners or they want to start a new relationship with the other. CD is a show of couples, hence it's realistic and portray real-life problems between them, Whereas in L&J, they try to find love between friends or other partners. This is more of crush and lust, in my opinion.

In both dramas the male leads loose their memories, personalities change, and are taken in by the FLs.

Both dramas center around a group of housemates who are friends. If you like that supportive environment in friend groups, then you might have fun with both dramas. Each also explore subplots of dating scenarios and housemate struggles. Even the homes they live in are kind of similar from the outside.

Differences: In Age of Youth, they don't all start out as friends. While Age of Youth has its fun and fluffy moments, it's also a drama with a serious side, unlike Crash.

Similar ??. Set in the time where China was under Japanese occupation the storyline speaks of how the two snipers become embroiled in the fight against each other first then against the Japanese.

Deep love between main leaders
Virtuous and suportive Empress
Power struggles
Diffilculties of poligamy
Side couples
Harem fights

Young ML/older FL
Boyhood crush
FL is an independent career professional
ML returns from abroad
Fated Boy is a less melodramatic version and the chemistry between the leads is playful and electric. Also family and friends are very supportive

Both these dramas focusbon a strong female lead who is the CEO of a corporation.

Also, another similarity that can be noted is that in the two dramas, the leads enter a marriage of convenience which eventually leads to their falling in love.

Fl is older in both (Stronger in Thai one)
ML chases the female lead first
Childhood crushes
Superb playful chemistry between the leads
No annoying/evil/screaming characters rather good supporting cast in both
Both same duration ~32 hrs

Both are second chance romance stories where a divorced couple learns to see each other in a new light and begins to heal old wounds.