My Holo Love was like a fantasy sci fi vr of Her Private Life? like if you combine all of the dramas in the recommendation, you'd get My Holo Love xD

Possessed had the best potential for the evil spirit drama, and they both share that same feel.
also they both have a female character that has "special powers" needed to fight the evil spirit

they both have that movie like quality, they both have Choi Byung Mo, and a dark vibe that walks on the gray line of what's good and what's bad

they are actually the polar opposite, but I started The Cursed because of Uhm Ji Won's acting in STTS, and her character here is like a combination of lee bom and bomi.
also, Choi Byung Mo guest roled in TC and he's character was slightly like STTS ;p

both Black Dog and Just Between Lovers are similar in their slow and healing nature, both had that cold blue vibes

both Keys to the Heart and Cheer Up, Mr. Lee are similar with the same kind of family bonding/touching story

both have Jang Hyuk and a female character with "abnormal" abilities. both are great quality mystery thrillers

I consider Tunnel as one of my favorite crime/mystery genre, and Tell Me What You Saw has the potential to be just as awesome~

Signal is my representative kdrama in the thriller mystery genre, and Tell Me What You Saw gave off that vibe, also the start of the 1st ep really reminded me of signal too

the main plot for both dramas involve dancing. and they also use dancing as a way to express their true selves, while it also connects the unlikeliest people in beautiful friendship

both had the "extremely" tall female lead, and "extremely" short male lead that end up partnered together, which adds to their self consciousness, and the story follows them as they try to grow

from the trailer both seem like time traveling mystery crime dramas about people trying to find justice through time