The main character is reincarnated as Ash, the character of the game he was playing. However, Ash was a so-called "helper character" who helped the main character in the early stages of the game and was later killed by the enemy. The only thing he can use to live as Ash is the knowledge of the game. In order to change the fate of himself and his favorite character, the villainess Mercy, he sets out to conquer this world. (Source: Brave Bunko, translated)

Carrying the baggage of the adventurers and in addition to other miscellaneous tasks in the guild… veteran adventurer Baru is known as a dowdy man who only does simple jobs, but is satisfied to live as such in the capital city. “I’m counting on you today too, Mr. Baru!” “Sure, I’d be glad to.” Be it the receptionist working at the guild or the people on the streets, they were all endeared by his friendliness and helpfulness, but they did not know—that he was in fact one of the “Eight Glories”, the one with the greatest strength, Bartholomeus. “Shall we go then, Lord Baru.” With the elf beauty who only trust in him as his follower, his is truly the War-God who rules over both politics and warfare. (Source: KADOKAWA, translated)

After Koganei was rejected by a girl he had confessed to, he angrily ran off and was hit by a car. When he woke up, he found that he was reincarnated in another world as Theodore Goldberg, the eldest son of a marquis. And of course, as Koganei is no stranger to isekai series, he knows that he will have some sort of cheat skill to become overpowered and live a slow life. And so he tries to open up his status screen... only to find that this world doesn't have video game stats. He then tries to use his OP magic skills... only to find out he is too young to even learn magic. So then he tries swordsmanship... but turns out to be weak with the blade. And so he decides to just invent modern technology to get ahead... only to find out that this world has magical devices which are identical to modern technology. Theodore is at an impasse. He's not strong, he's not smart, and he's not handsome. So what exactly is his cheat skill? For what purpose was he reincarnated in the first place if he was just reborn as an ordinary boy?

The Akihabara Dungeon—it's a new dungeon that has suddenly appeared at the remains of what was once the Radio Kaikan building. The interior of a dungeon is a mystical area where mana exists and mechanical technologies become useless. Within such place, the notion of danger exists every corner along with the endless monsters; dungeons can be remarked as the epitome of a "fantasy world." It is where "adventurers" who thirst for discovery and excitement live a life consisted of daily explorations... Shouma and Rio are high school students that spent their summer vacation exploring the dungeon in Akihabara. Due to some circumstances, they met each other and have set out to become legendary explorers. With Akihabara as the setting, a new epic that ties daily life with fantasy has begun its prelude. (Source: Japanese Publisher, translated)