【Manga Adaptation Now Available!】 The manga adaptation of this series is now available! You can read it on manga apps like Piccoma, so please check it out!

Three years ago, in the year 2022, every tower around the world transformed into a dungeon.

America's Washington Monument, China's Oriental Pearl Tower, France's Eiffel Tower, London's Big Ben, and Japan's Tokyo Tower.

Towers in countries across the globe suddenly, abruptly, and without any warning, transformed into dungeons straight out of games and anime. The world was shaken by this, and a dungeon boom began.

Three years later, in 2025, when Shiro Konomi, a hapless, unremarkable salaryman, returned to his apartment, he found an unfamiliar high school girl—Akari Hoshino—sitting beneath the cold sky. After inviting her inside and hearing her story, he discovered they shared a certain commonality. Upon Akari's earnest request, Shiro decided to become an adventurer with her and conquer the Tokyo Tower dungeon.

Posted on 2021/7/17

Completed on 2024/10/12

This work is also published on Kakuyomu.