As the head of the Photography Club, it's just right that Hyunjin finds a muse for him to take more pictures for his club, right?

That might be why he was bestowed upon you, the best thing that ever happened to him.

.. Well, you don't know him anyway, but that's fine! He'll keep admiring you in the dark.

So why did taking pictures of scenery that reminds him of you turns to taking pictures of you when you're unaware of your surroundings?

Perhaps that's why he's watching you from afar now, the camera in his hand all readied.