I'm Standing on a Million Lives 12

A group of mighty Cathean monks has arrived, and they join Yotsuya and the rest of the party to finally kill the dragon that's plagued the kingdom. Something goes awry, however, and when the smoke clears, Habaki Futashige is the only player left standing. Now it's up to the man who believed himself a loser back on Earth to step up and clear the quest before time runs out!

Volume 12 of the I'm Standing on a Million Lives manga series by Naoki Yamakawa.