Heroic Spirits: I've Really Tried My Best, Shinji

[Setting] The protagonist has Naruto blood and can awaken the Sharingan. He’s a ninja, with no System. Simply put, he’s from Naruto, in the Fate story.

[Synopsis] I became the unlucky Matou Shinji and somehow ended up in the dangerous Matou household. My grandfather is a monster, and outside, everything is blowing up from gas explosions. As a weakling, all I can do is desperately improve my strength...

Later, I got stronger, but I still couldn’t beat those freaks. With no other choice, I had to resort to schemes. What can I say? I was a villain to begin with!

Later still, I became the evil of this world. Then I suddenly realized that no matter how meticulous my plans were, something always went wrong. So it hit me: why not become the thing that goes wrong?

[About] The protagonist will appear in various worlds. His power will be held back at first to fit the setting and plot. The main story begins after Volume One. Early on, his power is low and he takes a cautious approach; later, he’s nearly invincible and just having fun.

[Plot] Volume One lays the groundwork. Volume Two covers the Fifth Holy Grail War, Sakura’s route, and Rin’s route, with heavily reworked character portrayals inspired by Today’s Menu for the Emiya Family and Carnival Phantasm. Volume Three follows the original Fourth War with original additions. Volume Four completely reworks the Holy Grail War. The next volume features an incursion from another world.

[Content Warning] The author hates tragic endings, so everyone gets a happy ending. However, some readers may consider not saving Sakura from the start a tragedy. To be clear, Sakura’s experiences have been softened: apart from being modified by worms, she suffers no other harm, and she is a virgin! This is very important. Don’t worry about whether it makes sense!

The Fifth War’s plot and character portrayals have been changed considerably, and the original story includes some of my own interpretations.

Readers who have or haven’t read the Fate series can give this a try. The plot is explained in detail, so it’s essentially a fan work.

The volumes aren’t closely connected...