Shokoofeh

- Same actor as female lead
- female lead has the similar character in both:
Rich and always angry :)))
- calm male lead in both
- lovely side characters (like a family)

- Fantasy drama about ghosts
- Female lead can see ghosts in both drama
- The ghost possessed the body of the lead and live in his/her body and grow feelings towards male lead in "oh my ghost" and towards female lead in "head over heels"
- traumatic past of the ghost(the way you feel sad for them)
- cold male lead/warm female lead:
At first in both drama male lead was cold and then slowly grow feelings.

- characters in both have supernatural powers
- a traumatic event in past
- male leads in both have the kinda similar vibe

- both drama are about beauty standards
- female leads don't like their appearance and want to change their face
- both male leads are center of attention (handsome)
- both female leads have beauty standards issues

- Jeju uprising
- sad vibe( both drama gives sad trauma)
- University/college life involves
( some scenes of WLGT remindes snowdrop)

- drama genre
- same vibe
- the IU acting and even some of her clothes in WLGT remindes my mister
- sadness/life problems
- charachter development
- poor female lead

- the thriller-action genre in both
- Nana starring as a badass one in both
- It shows how a series of event can change a person
- Hidden identity

- the way the offenders will be punished is the way they committed a crime in both(they experience the same pain/suffer they have given to others)
- the mystry behind cases is also similar
- both drama makes you hesitate that rules and justice doesn't work well in our life

- dark, thriller, mysterious.
These two are very similar, if you liked the plot twist in lost in stars and the mysterious theme behind you definitely like forgotten.
(I can't add more due to spoiler)

- both male leads are general
- both female leads are doing everything to help people
Investigating for cases
Want to recognise as their personality and hardwork not as someone's wife/fiancé
And both are smart
- revenge
- both male lead are protective and let the world burn for their beloved one

I found it very similar with when the camilia blooms because it has:
- the same actress
- the same scenario about "serial killer"
- close friends of the female lead get hurt because of her and get involved with serial killer acts

there was a scene in Soundtrack #1 where Park Hyung Sik was crying over a movie :)
werewolf boy was that movie with Park Bo Young starring^^