A

Takemichi is a 26-year-old unemployed virgin who learns that the girl he dated in middle school—the only girl he ever dated—has died. Then, after an accident he finds himself in a time leap back to his middle school years. He vows to change the future and save the girl, and to do that he aims to rise to the top of the Kantou region's most brutal delinquent gang.

When a series of animal bodies that rot away after a single night begin appearing in a remote mountain village, Inugami, a detective from Tokyo who specializes in the occult, is called to investigate.

10 years ago, after “the Gate” that connected the real world with the monster world opened, some of the ordinary, everyday people received the power to hunt monsters within the Gate. They are known as "Hunters". However, not all Hunters are powerful. My name is Sung Jin-Woo, an E-rank Hunter. I'm someone who has to risk his life in the lowliest of dungeons, the "World's Weakest".

The story begins when the gods call a convention to decide the whether to let humanity live or die, and settle on destroying humanity. But a lone valkyrie puts forward a suggestion to let the gods and humanity fight one last battle, as a last hope for humanity's continued survival. 13 gods will fight against 13 human champions in one-on-one battles to decide whether humanity lives or dies.

Hyeongoh, the first place student at school, is disabled and has a knack for getting ridiculed by the school's bullies. With no help and no way out, he finds himself in a despairing situation...until someone appears to stand by his side!