Both feature open relationships and leads dealing with commitment issues
Both have student falling for a teacher
Both are adapted from Manga-Webtoon
Both are steamy, dark, psychological dramas

Both dramas deal with friends with benefits, open relationships
One of the leads falls for the other even though it is not a typical committed relationship

Both feature Bae In Hyuk but in Kiss Goblin he can touch the FL
Both are about human falling in love with a supernatural being
Both have cohabitation involved
In both the dramas the ML is sweet tempered and the FL is a college student
Kiss Goblin is a very short and sweet drama series- in case you’re looking for something that will compliment your experience of Gumiho

Both dramas look at class difference. Both have working class FL and rich ML. In both the ML is anti social and rude. Both have the FL going through bullying but not as excessive as Boys Over Flowers. I loved the vibe of School 2017, the friendship is shown really well and seems more relatable.