Kim Aeri has always come off as a little weird with few loose screws. Sometimes you could spot her staring off into the distance and the next second she would incoherently tell no one in particular to ' off'. It wasn't a surprise to any that she had little to no friends and would instantly be reported if NASA suddenly announces that an alien had infiltrated Earth. 

Not even the school's biggest bully dared come near her. Everyone basically left her alone, to herself and possibly a handful of imaginary friends. 

When one day she disappeared all of a sudden, nobody failed to assume that she was probably sent off to some mental asylum at last. Not that she had any living family members to prove or correct the speculation.

She was just...gone. 

Not even one person stopped to think,

"Maybe she was kidnapped?"

"...probably almost fell to her death through the Bermuda Triangle..."

"...and into another realm...?"

If you did, maybe you have some loose screws of your own.

Not that you're entirely wrong.