Love in Protocol

Aside from both of these being KBL's, the only other similarity is that the relationship dynamic feels a bit dark. Love in Protocol is definitely not as toxic as Secret Relationships. BUT the dynamic between the MLs in Love in Protocol did remind me a bit of Daon and Jaemin's relationship.

There's an unhealthy reliance between the MLs in both dramas, a bit of an age difference (student and tutor) and a SPRINKLE of possible grooming.

Secret Relationships is more serious, with meatier episodes and a bigger budget. Love in Protocol is a quicker watch with lower stakes. I recommend both if semi-toxic love is your vibe.