both have school bullying themes
unexpected romances
focus on the emotional growth of the main characters
both FL have to learn to face their problems and not run away
both have idol ML
both are short viki watches

overall both of the series are very similar and good in their different ways. I recommend them

both fight evil spirits that possess people
both have school themes and refer to bullying
both have strong friendships
both are very good similar dramas and if you liked one you will love the other, promise

•both of them have kpop boy-bands
•both of them have supernatural side to them
•both have sweet and light-hearted vibe to them
•both are web dramas
•they are quite similar in different ways. Don't know how to explain it, but I promise you if you like one, you will like the other just as much!