MTL - What If I Accidentally Made My Debut? - Chapter 786 he hasn't lost yet

A boy from 21st century Earth, met an accident and later was reborn in Naruto’s Ninja World.
He is born in Uchiha Family and becomes the useless brother of Itachi Uchiha and Sasuke Uchiha…. Let’s see how he changed the Naruto world.

- Description from Novelupdates

“Legend had it that in the deepest part of the oldest galaxy, there was a door as red as blood and fire.

Legends and myths, darkness and light, countless stories passed through this old door.

The Door of Constellation that overlooked everything would warn the sky and earth, sending darkness back to where it belonged.”

When The Cute Kunoichis Spied on Their Teacher's Secret is a light novel written by Kazuma Kamachi and illustrated by Ryuushi Tajima.

The story takes place in a world where Japan never ended their isolationist phase, and agents from foreign powers are always threatening to steal the country's advanced technology. In order to combat this threat there has been a resurgence of ninjas that use Strategic Martial Arts, techniques that combine cutting-edge modern technology with a traditional foundation of martial arts and ninjutsu. The story follows Souha Sugiyado, a 17-year old ninja instructor and former ninja prodigy who was forced to retire from active duty by the wounds he suffered in his last mission. Souha's four students are all kunoichi who have all gained the rank of Elite Ninja, the highest official rank available to ninja. However, one day two Shogunate ninja approach him with the news that his four students have gone rogue and have stolen a portable modular nuclear reactor, and thus they ask for his help in bringing his students to justice.

Fourteen years old Su Bei almost died when she had a high fever, got transmigrated into another world and finally knew a shocking truth–it turned out that the world she was originally in was just a novel and her whole family were villains.

The woman who gave birth to them was the cannon fodder in the novel. She and Su Xiaobao were written like this in the extra chapter. One was a little bastard who tried to bully the male lead’s daughter and eventually got thrown into prison and the other one became an escort, who after having failed to seduce the male lead, was killed by an evil director. They also have a dad whom they never met and was the biggest villain in the book.

Back to her original world, the first thing Su Bei did was to take Su Xiaobao and find their father.

Su Bei: Su Xiaobao, quick, call him.

Su Xiaobao: Call him what?

Su Bei: Call dad.

Su Xiaobao: I don’t want to, do it yourself.

Su Bei: Dad!

Looking at these two dirty children in front of him, Mr. Qin’s eyes showed disgust.