This is an old-fashioned unlimited flow novel. If you like it, just watch it. If you don't, just click the red cross XD.
The male protagonist is Sakata Gintoki, so it is a Mugen-flow novel in which the female protagonist keeps complaining and turning into a monster.
This article is not NP, not Mary Sue, not novice. Sometimes it will destroy the image of the boss, such as Aizen and other idiots.
This article sometimes differs from history, please forgive me.