Go on the Webtoon app you'll have two categories (Horror & Thriller) there are some good ones. Some of them are on Mangago too but you can support the authors and Webtoon is free so...
- The Cliff: http://www.mangago.me/read-manga/the_cliff/
- Distant sky: http://www.mangago.me/read-manga/distant_sky/
- Dead days: http://www.mangago.me/read-manga/d...... reply
