Distant Sky

 is a Horror Webtoon Original written by Inwan Youn and illustrated by Sunhee Kim; it updates every Friday. The original Korean Webtoon premiered on Naver and concluded on June 25, 2018.

There are works that have a universe (Super String Universe) like this series:
 * Westwood Vibrato: Same creators, same universe
 * Jungle Juice: Same universe

Synopsis
''"Am I the only one still alive?" A boy wakes up to find himself in a building full of dead people, and Gangnam is shrouded in complete darkness. No cars, no electricity and no stars in the sky... Not only Gangnam but the entire city seems deserted.''