Recommendations

They are from the same company. Basically the same minutes and episodes, and both sinopsis are amazing!

'Roommate' is prequel to 'Soulmate'. It is the beginning of James' and Sky's story. In Roommate, the story begins as their moms force them into a shared living situation as university students.

ML in both come to earth and mingle with immortals. FL in both the dramas are doomed to die early in each lifetime

A mysterious man (who is more like an urban legend) murders people by using hallucinations that cannot be proven as real crimes due to lack physical evidence.

both female lead disguise as male in the palace and the male lead are both rlly handsome ++ male lead fell for the girl when they hvn know tat guy was a girl. Both dramas are rlly good and hv a good plot :)

not exactly same but both drama is about everyone is beautiful>>>>>

Both dramas are of an alien that arrives on earth and falls in love. In My Girlfriend is an Alien the FML is looking for something she lost while in Falling in Love with Cats the FML is looking for the one that saved her all those years ago.

Looks like Same plot!!
Fashion designing world
Both FL is a desinger and ML is CEO.
Both drama include FL and ML smart and talented. Both end up liking each other

It's a slow paced romance from Teenage to College. A sweet romance that feels so good to rewatch in gloomy day, curled up in bed with warm blanket and comfort food. Strong bonds and great chemistry between the leads. Love it!

Haven't watched Tunnel yet but by what I read both mains travel to different scenes to solve cases and they stay in the other scene for almost the rest of the drama.

I found myself wondering if The Devil Punisher was not a remake of Goblin. They have somewhat of a similar esthetic (though Goblin is much better made); look at how similar the show posters are!
If you like stories about ghost fighters and amnesia, then you'll love Goblin.

The lollipop. (you will see what i mean)

Also, both are mystery, detective dramas.

They both have the life of school children and their parents. Plus one of the couples in A Little Reunion is the same couple in A Love for Separation.

In both dramas FL will get into ML's house by fake identity. ML is cold and aloof but will slowly warm towards FL who is bright and will often get into embarrassing situations.

I haven't finished Rookie Historian yet (I'm currently binge watching), but I can see some similarities in the male leads personalities. Both are imperfect in the sense that some dramas tend to make de ML good at everything, and both are like giggling school girls after interactions with the FL. Both female leads are also strong women with strong personalities.