Ianto made his way to the top of the building. He could see so far away, and decided to focus on the five orange blobs in the distance.
"I feel like a superhero up here." He chuckled to himself. "Super..." He looked at the costume he was wearing. "Super...Hoodie."
Deciding to get closer and figure out what the orange blobs were, he figured he was in a dream or something, so he could jump the gaps between buildings.
After getting closer to the orange blobs, he discovered that they were in fact people, five people doing community service. He watched one of them, with curly hair, make some rude joke at another, with black slicked down hair and piercing eyes.
Ianto gathered from the chavvy girl's remark "Oi, Nathan, stop being a prick to Simon!" that the curly haired boy was Nathan and the boy with the eyes was Simon. Mentally noting it down, in case it came in useful in some weird situation, he decided he should move before he was seen. He stood up from his crouching position and turned around.
"Why were you watching me and my friends?"
Ianto almost jumped out of his skin. Deciding not to answer, he walked to the edge of the building, glancing round at Simon before leaping off the side.
...
Simon had been ignoring whatever insult Nathan was throwing at him this time, barely noticing whether he'd called him "Simon" or his usual "Barry" as he was staring up at the roof.
There was a man up there, in a superhero costume, watching them. Making sure the others were focused on different things, he used his power to turn invisible and made his way to the roof of the building.
When he got there, the man was just turning around, Simon decided to ask him outright.
"Why were you watching me and my friends?"
He said friends, as he really wanted to be their friend, but doubted they considered him one.
The man looked scared, not that Simon could see his face, but he'd jumped a little when Simon had spoken.
"I'm sorry; I didn't mean to scare you..." He wasn't sure why he was apologising to someone who was almost stalking them, but didn't really have time to think about it because the man got up and jumped off the roof of the building.
Looking down at the others, he knew they hadn't noticed he'd gone, so followed the man, jumping after his sprinting figure.