From "Touken Ranbu ONLINE" (DMM GAMES/NITRO PLUS) by Yaeko Ninagawa

This is the official spin-off of the popular PC browser game and smartphone app "Touken Ranbu ONLINE"!

In the year 2205, historical revisionists have begun attacking the past. To prevent the alteration of history, the sage awakens the sword spirits known as the "Touken Danshi." Amidst the battle to protect history, the Touken Danshi of a certain citadel encounter mysterious apparitions, whether during their missions or in their daily lives. This is a completely original story, presenting the beautiful and eerie tales of the Touken Danshi!