The Warehouse

Do-Hyun is living an average life in an increasingly degenerated world. After taking a smoke break, he suddenly wakes up at a gym warehouse being tied up. Do-Hyun is stuck in the nightmare fantasy of his poker-faced but familiar kidnapper Sung-Ho. By reviving his memories of his old high school gym warehouse, Do-Hyun tries to find out who tortures him. His delusional kidnapper viciously recreates past occurrences that happened there. While trying to win the upper hand, Do-Hyun unleashes even more of Sung-Ho's controlling energy. When Do-Hyun collects more and more pieces of the puzzle, he realizes that there is a deeper issue of careless behavior to the whole story...

(Source: NetComics)

Note: includes four side stories, one prologue, one epilogue and one extra.