Recommendations

Orphan of a wrestling legend....
Dojo threathen to buy by a rich rival dojo / gym...

not dorama but anime - Sekai de Ichiban Tsuyoku Naritai!
very similar in many ways.....
While Tofu Wrestling is idol highschool girls wrestles part time....
In Sekai de Ichiban Tsuyoku Naritai!, idol goes into wrestling after witnessing her friend being beat by a pro wrestler....

lead cast in Sekai de Ichiban Tsuyoku Naritai! - SAKURA
lead cast in Tofu Wrestling - SAKURA
both wears red & white wrestling gears
both faught to reach the top (finals)
both are short black hair (In the anime Sekai de Ichiban Tsuyoku Naritai! Sakura cutted her hair in the middle of the series)

The male leads are pretty similar in how they like peculiar things and the way they lookout for the female leads while tying to hide their feelings lol

Both have gruesome deaths and students must learn to survive. Both involve lots of murder. Although, it's not a mystery like Death Bell.

Both are horror. Also, villians are similar. Both are satisfying psychological thrillers. Both the villians murder the students in horrendous ways. Both have school settings.

-Time travel to save the one you love
-Both of them are really good.

Just watch it and you will see the similarity.

In each drama, their is a girl with very good qualifications who ends up moving in a socially awakward -yet accomplished- man.
This living arrangement will lead to a marriage of convenience.

Set in the same time period, both dramas follows young individuals, their infatuations, love, deceptions and growing up.

While the storyline is different, the dramas give off the same vibes.

Both feature foresight/changing reality
Both have a touch of mystery, action and romance
Both have Lee Jong Suk starring as the male lead

It's set in the making drama production world this time focusing on directors and some writers. It's interesting to take a peek of how the lives of people who write and direct what we watch probably unfold and it's very well written too.

They're both about marriage, time travel and regretting your past, when I started watching "Go Back Couple" I immediately thought about "Operation Proposal" :)

Both are relatively light-hearted dramas featuring ghosts which eventually become friends with the protagonists. IASILY has a male ghost, N has a female ghost. Both dramas have a great balance of comedy, romance and melodrama.

Both the histories are about female prosecutor and their daily, but the histories are interest with unsual events.

One of the main characters has a girlfriend and will develop feelings towards a guy. Other stories, BL or not will also be told throughout the series.

Aim who played Plern Pleng, Knock's girlfriend... now ex will be part of What the duck. She is also the girlfriend of one of the guys but different from TWM's Plern Pleng, she has a story to follow. Not someone who plays the villain between two guys.

Both has the same format of having several stories on one series. The core story following two guys developing feelings toward each other. With other stories connected to the main characters.