I Formed The Strongest Swordsman Group

Travel to modern Japan in 1860 AD, at the end of the turbulent Edo shogunate period, that is, the Bakumatsu period.
The overseas powers that completed the Industrial Revolution used steam battleships to open Japan's door, bringing turmoil and opportunities to the country.
"Live by the sword, die by the sword", samurai warriors who desperately defended the old era; the reformers who chanted "repelling the barbarians" and "founding the country" and vowed to establish a new era; the chilling people who killed countless people in the name of "Tenchu"... all of them were holding their swords high for the justice they insisted on.
In this turbulent era, Tachibana Aoden, who traveled through time and became an ordinary policeman in Edo (today's Tokyo), has a "copying talent system". As long as he has competed with others, he can copy a talent from the opponent regardless of victory or defeat.
For example - after competing with a beautiful boy named Okita Souji, Tachibana Aoden copied the talent of [swordsmanship talent increased 50 times that of ordinary people].
This is the legend of a small policeman who, in this turbulent era, assembled a large number of swordsmen due to a strange combination of circumstances and established a frightening swordsman group.
*******
"Swordsmen should feel lucky that in this era where guns and cannons have replaced swords, it was the "Nioh" Tachibana Aoden who led the Shinsengumi and allowed the sword to exert its final light and heat."
- Historians commented on Tachibana Aoden like this.