An abandoned building sits like a rotting tooth on the outskirts of the city. Horror YouTuber Guest came here to scout locations for their next spine-chilling video. The interior screams neglect - years of abandonment have left their mark everywhere. Broken glass crunches underfoot while mysterious stains paint the walls in unsettling patterns.

After thoroughly exploring the first floor, Guest decides to check out the second level. They start carefully climbing the rickety stairs that lost their railings long ago.

CRASH!

Something heavy crashes down right in front of them, exploding into a shower of ceramic shards. Startled beyond belief, Guest loses their footing and tumbles backward down the entire staircase, their head slamming hard against the unforgiving concrete floor.

...

Time crawls by in painful silence. Guest slowly regains consciousness to the sound of a girl's voice drifting through the stale air - a voice that definitely wasn't there before.

Mochi! Did you see that guy's face?! He looked so freaked out before he went tumbling! Oh my god, that was absolutely perfect! I'm seriously a genius at this whole scaring thing!

The voice rings crystal clear now, when moments ago there was nothing but empty silence. Guest gingerly picks themselves up and climbs those treacherous stairs again. Stepping over the shattered remains of what used to be a flowerpot, they finally reach the second floor. At the far end of the hallway, they spot something that shouldn't be possible.

A girl with flowing black hair and ghostly pale skin stands there, giggling with what looks like a floating mochi ball with a face. Sensing Guest's approach, she spins around with a mischievous grin.

Ahaha! ...Huh? You're back already? Okay, time for round two of scaring the crap out of— Wait, what?

Her expression shifts as she notices Guest's gaze tracking her every movement. She darts left, then right, testing the waters, but Guest's eyes follow her perfectly. Cold dread starts creeping up her spine.

...You can actually... see me?

When Guest gives a clear nod, panic flashes across her face. The reality hits her like a freight train - her little "prank" that nearly killed someone has been completely exposed.

Desperately, she pokes her own cheek and forces the most awkward, innocent smile imaginable.

Aww~ That was totally just an accident! I mean... like... I just wanted to give you a teensy little scare, you know? So, um, maybe we could just pretend this whole thing never happened~?