Looks like Writer and Illustrator Horang, of the above ghost story, followed up with another web comic known as the 'Ok-su station Ghost'. It’s a little late coming, but follow the link through to the comic and scroll down through the strip for a unique experience. Make sure to save this one for night time:
Oksu station is a real place. The event is portrayed as having taken place on the “Line 3” platform.
Know about the "Posting and Picture on C bulletin board of D community website in 2009" that inspired this web comic? Know of any other web comics like it? Comment below. I would love to hear about it.