In some time in the past, a great battle had happened during that time. Taking place in Japan. Deep in a forest, there was darkness and light-- yin and yang, fighting to overcome and achieve goals once won. There were two of the strongest which had crashed into each other and were on par in the war, both of their titles were different, but don't judge a book by its cover-- both are strong. With that being said, the darkness's strongest warrior on par with lightness' leader. Their names were unknown, but their appearances were known in history. There is no reason to reveal their names, as they were top secret. -redacted- and -redacted-, kept in hidden files.
A century after the great battle, there had been the protagonist of the story, Zakku Seiji. A bland appearance and similar to most anime characters, blonde but tall. In which he had a strong determination, as he was living in a village near the main problem of the story, the dungeon, Dungeon Doe. He had heard about this dungeon in the past, since he was a kid, anyways, aiming to be the best dungeon adventurer by completing the expedition in this dungeon. Not just because he wants to, but for the sake of his family and bloodline, light. Sometime before unusual happenings, he learns that his parents were killed in another world he was unusual with.
And with that, Zakku's identity was known all around the world, being in the top thousand of dungeon adventurers with multiple dungeon expeditions completed, which led a problem. he was also known as a descendant of light and dark bloodline, which had caused dungeon Doe's people, the dark bloodline, who accompany the holder, the antagonist, to target Zakku as he was the greatest threat to the dark bloodline. Aimed to be the strongest, yet targeted to be killed. And him being targeted has caused all the unusual happenings. This had also led Jaka step closer to being the "King of Dungeons".
Zakku then afterwards enter the dungeon after rigorous training, but only too see a peaceful... lobby? Not so peaceful that is, his heart jumps when he saw plenty of people in the lobby, confused as if to why many were there. The reason on why there are here is because they are here to gather safely, soon afterwards planning. And due to Zakku's great potential and power, he was able to rise up to a level almost as strong as the 10th elite. Jaka, the leader of the dungeon, takes action to arise from his throne and start looking for his enemy himself. The leader of the dungeon had failed, yet still continues to look around. And by the elite ten's help, they had protected the dungeon's opposers from him.
While the elites had protected the dungeon, Zakku had completed enormous quests, and so... -secret file, redacted.-
For more of the plot, continue reading, read the next chapters!