A mysterious god-like entity has given Ed a crazy ordeal in which he must be expelled from a party of 100 heroes in 100 different worlds in order to return to his original world, but he finally achieves the condition and is able to return to his original world. However, as a final additional condition, he is given the chance to "see what happens to the worlds he has been banished from."... This is where he learns a shocking fact. "All right, I'll do it! I'll go there again and be banished for good all over again!" Only this time he is accompanied to these 100 worlds by a former companion... "Fufu~, don't worry! I'll be with you this time!" "Yeah, I'm more worried..." (Source: Shousetsuka ni Narou, translated)

A mysterious god-like entity has given Ed a crazy ordeal in which he must be expelled from a party of 100 heroes in 100 different worlds in order to return to his original world, but he finally achieves the condition and is able to return to his original world. However, as a final additional condition, he is given the chance to "see what happens to the worlds he has been banished from."... This is where he learns a shocking fact. "All right, I'll do it! I'll go there again and be banished for good all over again!" Only this time he is accompanied to these 100 worlds by a former companion... "Fufu~, don't worry! I'll be with you this time!" "Yeah, I'm more worried..." (Source: Shousetsuka ni Narou, translated)

Several decades ago, “dungeons” appeared in the world, and people who awakened to mysterious powers called “skills” began to emerge. They came to be known as explorers, defeating monsters in the dungeons to gain wealth and fame. This is the story of one boy aiming for the very top in such a world. Noboru Takegami is a boy who also dreams of becoming an explorer, but the unique skill he acquired, Skill Collection, only allows the effects of any skill he learns to function at one-tenth of their normal power. Because of that, people around him mocked him as having “the weakest unique skill in human history.” However, one day, after suddenly falling into a pitfall in a dungeon and fighting desperately against monsters, the total number of skills Noboru had learned finally reached 10,000, and he obtained a super–high-rank skill called Overwhelming Might. This skill dramatically boosts physical abilities in proportion to the number of skills consumed — making it an absolutely perfect match with Noboru’s unique skill that allows him to learn an unlimited number of skills. Now that he’s obtained the strongest weapon, a super–high-rank skill… Can Noboru finally become the “Hero” he’s always admired!?