Recommendations

It's most similar in the play of psychological thriller sense. Although Cello is caught up between supernatural and psychological, Insane also gave that thrills and chills with it's great execution of the plot.

For me Insane is most similar to the kind of movie I imagined Cello to deliver.

Double Mints is a darker take on the BL mafia genre and master/servant mechanics that we will see on Kinn Porsche

Both series feature mafia/hitmans as their main characthers. Chasing scenes and all the mafia style seduction is similar.

Both series have a mafia heir as their main characther seducing an outsider and the trailer have some look alike scenes.

We Best Love: No. 1 for You features swimming as a sport and so is Water Boyy. Both series also have BL elements of a drama. Both of them also feature cute main characters in a school setting.

In both the series they live together. In the beginning they don’t like eachother and in the end they love eachother.

They also try to fight hardships with their restaurant or pub, and the vibe was similar.
I know the cast in this is more young, inexperienced and this one seemed less mature, it could be great for those who are searching for something similar.

The relationship is from hate to love and the friendship is great as well. Although it can't beat Itaewon class for me, it is similar in many ways, has a nice ost as well and I think the actors did a good job. This one is more relaxing :)

Energedic Company, the production house behind the widely popular “Where Your Eyes Linger,” is behind this new gourmet romance.
Jeon Jae Yeong will reprise his character role of Kim Pil Hyun from “Where Your Eyes Linger.”

It is original Taiwan version of "a love so beautiful" with same drama outline and plots.
Male lead with super high IQ and handsome tall look
Female lead with low IQ and cute shorty look and chases the ML since beginning of drama
Second ML with athletic skill and so prominent one sided love to FL
FL has lovely and funny classmates
Both ML and FL are childhood friends and vaguely care each other in many ways

The only difference is ML in TW version has a rich family background while ML in Chinese and Korean version has broken family background..

When it comes to supernatural, I feel like these two complement each other perfectly. Both have the perfect amount of romance, action, and so much more. The storylines are my favorites.

When I was watching Imawa no Kuni no Alice, I thought it reminded me a lot of Battle Royale. Although they are both different, they are similar in a lot of ways.

Both shows are really dark and have really interesting settings. It feels like they go hand in hand, honestly. Lol

Both really have a dark creepy vibe. If you finish one and wonder what other show is like it because you're in that kind of mood, I recommend these.

Both these series are supernatural tales that have a past meets present twist. Of course both are in the BL genre.

-both have cute male leads
-both are based on startups
-both have supportive female leads
-both have very cute office romance