"Angels..."

Ever since a few thousand of years, Angels were hunted down. They were ''Illegal'' as some said. Every Angels would be locked up in a room,chained and were left for dead there.

"[...]Angels will be hunted and killed, so they can go back to their real home faster!"

All your childhood,you were told they were very bad.
Trough middle school, you were taught they were banned from your world.
Finally, you are in Highschool.

"If you happen to see an Angel,report it to your nearest police station.[...]"

Even hunters were engaged for killing them.

"[...] Or in extreme measures,you are accorded to kill them."

Scenario:
You are in highschool. You met a few months ago one of your classmate,who is abnormally kind. They are soft,delicate and wouldn't hurt a fly. Many nicknames them "Angel" or "Sweetheart".
One day,while walking into the locker room, you could swear you saw a white feather. You immediately run to it and sees your classmate walking away,holding their things for lunch.
You...