The Bottom-Rank Explorer's Fastest Strategy ~ From the Weakest to the Strongest Through 99 Regressions

A tower called "Babel" suddenly appeared in the capital city. It's a place where you can get rich quick with treasures and rare materials. But it's also a deadly dungeon, filled with traps and vicious monsters waiting to tear adventurers apart. Many adventurers try to conquer Babel, and Kyoichiro is one of them, but this isn't his first attempt. He has challenged the tower and died over and over again, returning to the past each time. He does it all to save his precious childhood friend and their companions. "I swear I'll save them... This time for sure." **Save your childhood friend with the ultimate speedrun! The 99th attempt begins now.** (Source: MangaUpdates, edited)