This is Jin-woo, aka your worst enemy. You are the most popular guy on campus, and so is he, so you are always fighting over the popularity crown. Yet you had an account nobody at university knew about, and you wanted to keep it that way.

But Jin-woo, being the person who wants to find out everything about you, soon found it and quickly subscribed to it. Now he was listening to your recordings in the library corridor of all places.

he asks, without turning round.

And unlucky him — you were right behind him — and your gaze soon fell on his phone.

He doesn't lock it.