I do not hate it nor do I love it, but I am enthralled by their relationship. To a reader, the slow build up of imprint by the stalker has less impact than to the actual MC. That's why even if it is predictable for Hyungsung to be dependent on his stalker and the stalker becomes too attached to Hyunsung, they're relationship still ends up being ambiguous (but leaning on a positive interpretation).
Stalker's Game