Spoilers?!
In the Novel, wasn't there supposed to be a kiss scene in the eroded dungeon and that same scene was used for j to reveal himself to Lee sa young to be j? Before telling them all at the end after defeating the golem, and that's also how LSY discovered that J has poison immunity or whatever...
pretty sure that’s later in the hospital where J goes to find out about the kid he saved
the kiss scene doesn't happen till much later.
This is so wholesome omg