Honmaru's life is easy.
Kiku Ichimonji, who is a thousand years old, thinks that it would be good if he could live in old age like this.
But fate is always dramatic.
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This is the story of Kikuichimonji's growth from darkness to darkness, then to whitewashing, then to continued darkness, and finally remaining in a half-white [crossed out] elderly version [crossed out].
There is a significant difference in personality between the dark and white characters, but what remains unchanged is the persistent desire to be Oni-chan.
There are many private settings, and the plot is as rational as possible.
It is set here that Kikuichi Monji Norimune is Okita Souji's sword. As for the reason... I will tell you later when I think of it.
The order of the articles is probably to complete Touken Ranbu, then an Onmyoji dungeon, and then to the manga world [tentative, subject to change].
The cp has not yet been decided, it depends on the plot development.