Change History? I'm Just a Pension Pill.

While other Honmaru secretly fell into the shadows and turned the world upside down, my Honmaru was having a great time. And I am just a little salty fish. I occasionally dress up as a junior high school student and play tennis. This is my only hobby. It's just that the Honmaru 100 blade consumes some spiritual power, and you'll fall asleep as soon as you hit it. It doesn't matter, it doesn't matter, haha. By the way, my name is Jirou Akutagawa. ————— It was like this until I met Yukimura, sighed at how beautiful it was, and was locked into a small dark room by the most beautiful blade in the world... "Aruki, who is more beautiful between you and Yukimura?" —————— Originally, the owner of the house had always been a mess and had no other hobbies except tennis. Everyone got along well with each other and was very good. But why did the owner suddenly like a human being? !