Both dramas highlight a toxic relationship between two students. In these toxic relationships, both series show the ex of the main character is not wanting to move on and harassing them. Both series show how the actions of the toxic ex is negatively affecting the life of the main character and how the main character deals with the situation they are in. They both also incorporate mature topics such as harassment, SA, etc.
I do think 'The Effect' is a little bit more intense than 'Dinosaur Love'.

Although Fahlanruk wasn't my all time favorite, I do think that if you liked it you'll like Bed Friend because they both follow the "friends with benefits" trope. I think the main thing that makes these two similar is that one person catches feelings for the other one and then things spiral out of control.
But yeah so if you liked Fahlanruk then I definitely think you give Bed Friend a try!

Both dramas revolve around a doctor at a hospital and what makes these two very similar in my opinion is that both doctors have troubles with not being able to save patients lives (in different aspects obviously) and they both are communicating with “the other side” i guess you could say . I’m currently watching both at the same time and they’re giving off similar but noticeably different vibes (the plots are different from each other as well as other hospital dramas i’ve seen) in my opinion but both are great so far ! so you should definitely give both a try !