Sok-woo, a father with not much time for his daughter, Soo-ahn, are boarding the KTX, a fast train that shall bring them from Seoul to Busan. But during their journey, the apocalypse begins, and most of the earth's population become flesh craving zombies. While the KTX is shooting towards Busan, the passenger's fight for their families and lives against the zombies - and each other. Written by Anonymus

Three teenage boys Yong-ju, Gi-Woong and Gi-Taek, were once best friends in middle school, but they become estranged from each other once they enter high school. While Yong-ju and Gi-Taek still remain close, Gi-Woong becomes a jjang (Korean slang term meaning "best"), one of the strongest fighters in the school, and begins to hang out with Seong-jin's gang (Seong-jin's parents are powerful figures, making him a bigwig among his schoolmates). Yong-ju becomes concerned when he finds out that Seong-jin's gang is mercilessly bullying Gi-Taek, an eccentric manhwa fan. Under intense pressure to get into a prestigious university because of his financially struggling single mother, Yong-ju develops an unlikely relationship with Gi-Woong, who tries to break away from Seong-jin. But when Gi-Taek learns that Yong-ju is gay, he betrays his friend and joins Seong-jin's gang in ostracizing him, telling them that Yong-ju has loved Gi-Woong for years. Written by jaideejung007