ROOM 19 : The Room That Vanished Overnight

When Room 19 disappears overnight, everyone insists it never existed.
Except Han Seo-jin - the only person who remembers the boy who lived inside.

Block C of Haneul Residence was ordinary...
until the morning the corridor shifted.
The doors jumped from 18 to 20.
The wall was clean, smooth, untouched.
And the quiet boy who lived in Room 19 - Moon Ji-ho - was gone without a trace.

No records.
No memories.
No past.

But every night at exactly 3:12 AM, Seo-jin hears it:

A slow, patient knock.
Coming from the wall where the missing door once stood.

As he digs deeper, disturbing truths begin to surface -
secrets about the building, the tenants, and Ji-ho himself.
Because Room 19 didn't disappear.

It was erased.

And someone... or something... is trying to come back.

_________________________

DEAR VISITORS
STEP QUIETLY.
THE DOORS DON'T LIKE TO BE DISTURBED.

"IF YOU HEAR THE KNOCK...
DON'T ANSWER."