Bakumatsu◆Kayo no Chigiri ~Tsukikage no Himegoto~

A shadow falls over a dazzling world-an alternate Bakumatsu.
For generations, the Tokugawa shogunate was held up by a single sword, and those sworn to protect it.
You, flung from modern times into the past, are chosen as a candidate to guard the sword...
And to shield you from forces that can twist fate itself, you're entrusted to the Shinsengumi.
Thrown into chaos at history's end you meet men fighting desperately just to survive. Every day sweeps you along in their storm.
Your feelings give strength to the sword-becoming a pillar for peace in this world.
Will you embrace your destiny as Sword Keeper, or risk everything for someone you love?
Beyond secret vows and hidden bonds-what will your hands finally grasp?

[Translated from the official website]