After the mysterious mana calamity, Rudeus Greyrat and his fierce student Eris Boreas Greyrat are teleported to the Demon Continent. There, they team up with their newfound companion Ruijerd Supardia—the former leader of the Superd's Warrior group—to form "Dead End," a successful adventurer party. Making a name for themselves, the trio journeys across the continent to make their way back home to Fittoa. Following the advice he received from the faceless god Hitogami, Rudeus saves Kishirika Kishirisu, the Great Emperor of the Demon World, who rewards him by granting him a strange power. Now, as Rudeus masters the powerful ability that offers a number of new opportunities, it might prove to be more than what he bargained for when unexpected dangers threaten to hinder their travels.

Wataru Sajou is infamous in his school for persistently seeking the attention of his crush, Aika Natsukawa. His usual day revolves around shadowing her and confessing his undying love at every turn. However, a moment of epiphany leads Wataru to relinquish his childish behavior and face the reality that she will never return his one-sided feelings. He distances himself from Aika and spends his newfound spare time with his friends and in the company of other lovely girls. As Wataru moves on, Aika starts approaching him in unusually suggestive ways—making him question whether giving up on his love was the right decision after all.

Since the death of his parents, Shinpei Ajiro had lived with the Kofune family and their two daughters—Mio and Ushio. Although he then left his home island to continue his education in Tokyo, Shinpei returns after Ushio tragically drowns during the attempted rescue of a little girl. During the funeral, his best friend informs him about bruises found around Ushio's neck, casting doubt over the cause of her death. Suspecting a murder has taken place, Shinpei reevaluates recent events, but strange incidents only continue to transpire. Disappearing people and other unexplainable occurrences lead Mio to recall an old folktale referring to entities called "Shadows," which may not be entirely fantasy. Supposedly, an encounter with one's Shadow foretells the person's impending demise. Facing the dark side of Hitogashima Island, Shinpei stands against his grim fate to fulfill Ushio's final will—to protect Mio.

The "God of High School" tournament has begun, seeking out the greatest fighter among Korean high school students! All martial arts styles, weapons, means, and methods of attaining victory are permitted. The prize? One wish for anything desired by the winner. Taekwondo expert Jin Mo-Ri is invited to participate in the competition. There he befriends karate specialist Han Dae-Wi and swordswoman Yu Mi-Ra, who both have entered for their own personal reasons. Mo-Ri knows that no opponent will be the same and that the matches will be the most ruthless he has ever fought in his life. But instead of being worried, this prospect excites him beyond belief. A secret lies beneath the facade of a transparent test of combat prowess the tournament claims to be—one that has Korean political candidate Park Mu-Jin watching every fight with expectant, hungry eyes. Mo-Ri, Dae-Wi, and Mi-Ra are about to discover what it really means to become the God of High School. [Written by MAL Rewrite]