Academy Assassination Genius

a novel that I have read for a long time with affection

[The main character is cut to pieces by the assassin’s sword. And he died just like that.]

“What?”

But this is the end of the novel!

“Wtf, how can this be the end!”

a well-over 5,700-character critique sent full of rage

And when I woke up again, I was a character in the novel.
I am the assassin who has to kill the main character!