He arrived in Japan's Sengoku era.
As village chiefs from all sides fought among themselves, Niwa Tensho pondered for a moment.
Naturally, he would side with Uesugi Big Sis, who would always forgive the people under her command, no matter how often they rebelled.
The one thing he hadn't expected was that Uesugi Kenshin really was Uesugi Big Sis.
Thanks to his modern knowledge, Niwa Tensho quickly became the number two in the Uesugi clan. He planned to bide his time, overthrow his superiors, emerge from Echigo, and unite the warring states.
But during the Battle of Kawanakajima, he was inexplicably sent to the front lines. Before he could overthrow his superiors, Niwa Tensho was still a retainer of the Uesugi clan. Fighting his way along, he somehow ended up in the Takeda headquarters and, by a twist of fate, accomplished the legendary "one-on-one duel."
Then he transmigrated back to the modern day.
And he was still holding Takeda Shingen.
He was miserable.
Why were all the Sengoku daimyo women?!
A few days later, at a nearby anime convention, Niwa Tensho found his own lord and the neighboring Hojo Ujiyasu. Suddenly, he realized just how serious the situation was.
Sure, back in the Sengoku era, I was your retainer.
But if I can't get back to the modern day, then I've been raising three daimyo for nothing!
He ruthlessly exploited the three Sengoku daimyo, finally getting to pay them back for all the suffering he'd endured as their retainer.
And then... they transmigrated back again. Again.
