Recommendations

Brothers love same girl ...
Both good looking...
Kinda sad drama...
Prepare your tissue...
...
Mental issues

its quite similar
both are c dramas
when the FL kisses (touches here) the ML are able to taste things.
Both the male leads are superior (like the are famous)
TFIY is a modern Chinese drama where as YSIMD is based on ancient times.

Both films have Samurai versus Ninjas!
Lord Nobunaga Oda tried to conquer Japan but one province still gave him so much trouble! The Iga territory where the Iga Ninjas lived already defeated.his son's 10,800 men so Nobunaga attacked Iga province a couple of years later with 42000 men!

Both movies have Samurai and Ninjas! Hanzo Hattori is probably the most famous real life historical Iga ninja who saved the life of his lord Ieyasu Tokugawa !

Both have Ninjas versus Samurai! Azumi is a young orphan trained to be a ninja and assassin!.....................

Ronin Samurai aka Lone Wolf with Cub fights against shadow Yagyu Ninja attacks after they frame him against the Shogun!

the chemistry between the main character and how they solved the case
i put this because when i watch sakurako-san i felt kinda similiar feel? like when i watch okitegami kyoko? and like what i said earlier, the chemistry between the character is really good either sakurako san or okitegami kyoko
sorry if my english bad ^^

- both have unreliable narrators and major plot twists
- both make you question everything you think you know
- both have hidden connections between the leads
- similar atmospheres imo

Undercover cops, mafia, revenge plot, fights, excellent actors, moral ambiguity, high production value

Both Grandpa has similar behavior and spirit (did gym and ballet) anddddd [spoiler]
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Dementia[/spoiler]
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Fragmented narratives, ghost stories, memories, art as self actualisation, loneliness, forgiveness, female desire, suicide, trips abroad, affairs as beginnings, affairs as endings, toxic relationships, broken relationships, class differences, tragedy, betrayal, motherhood, bourgeois family as a trap...

Both feature swoon-worth Joseon romance between a "prince" and a palace official, strong female lead and beautiful aesthetics. We also get some gripping palace politics going on.

- Same Production Team
- Fantasy/Mystery Romance with multiple layers
- Very Good OST's (the two OST's from SOOD are to this day the best use of music in a drama I have ever seen)
- Ke Jiayan (Alice Ke) is in both (in SOOD she's the lead, in RLGL she's one of the gods)
- Both have a non-linear plot structure

MLs are Generals who love the FL dearly.
Arranged marriages.
Both they fight for the country.
TRP is deeper in conspiracies and there's a status in the identities gap.
TRP is more mature.
The couple fight side by side and develop trust and understanding
The beautiful love stories in both for ML and FL are the best

Both are "behind the scenes" one with tv production and one with the entertainment industry as a whole.