World After the Fall, Vol. 10 (manga)

From its strange inhabitants to the bizarre rules they follow, Abyss has been a confusing experience to Jaehwan. But when he spots an old friend he never expected to see again getting dragged away, his next goal instantly becomes clear—rescue Yunhwan, no matter what it takes! His desperate search leads him to Metaverse, a Nightmare Tower designed only to provide depraved entertainment to the gods of Abyss…