The Siren's Song

After an encounter with a strange boy with pretty purple/pink hair, Kim Taehyung learns more than he expected about both the people around him and himself.
~~~
He has a dream that night.
He's floating, drifting amlissly through dark waters. At first he thinks his eyes are closed, it's so dark around him. But then a bright pink and purple something streaks past him, so quickly that Taehyung's not sure if he simply just imagined it.
Maybe not, cause it goes past him a few more times before finally settling in front of him.
It's the boy from earlier, but he's changed.