Where are you?

I think I saw him again but this time not face to face. He's so far away from me. Hwee saw him first and I managed to see his back. The same black billabong cap.

I just came back from canteen 4 hoping to catch a glimpse of him but sadly, no. Rui went to canteen 4 with our class hoping to see Billabong too, but looks like she left empty-handed.

I don't know anything about you.
Just exactly where are you?