Both have the same male lead and both are very meritorious but fictional tales. One great difference between the leads of both shows is that in The School Nurse Files the leads are more friends overall and even though compassion is shown for each other, it isn't elaborated on. Whereas in Abyss the two leads do end up in a relationship.
If you would like to see more good shows check out my list! <3
If you would like to see more good shows check out my list! <3