It’s a Japanese suspense manga written and illustrated by Haro Aso, and collected over 18 volumes. The original version’s storyline revolves around a trio of high school students; Arisu, Karube and Chota, who are bored with their lives and one time, they get transported to what seems like a post-apocalyptic parallel world. Soon, they finally found out that they were in a game, and they must play and win those games in order to survive.
