Rebirth: The Time-locked Girl - Chapter 4 - 00 Seven-stringed Zither, Battle-Breaking Music

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.

The Demon Empire in the universe was reborn and came back! Enemies should kneel down in front of him! Beauties should lie down in front of him!

“I am a demon. I enslave gods and immortals! If you don’t succumb to me, I will convince you by force!”–Ye Feng!

An ordinary student accidentally traveled into an other universe and became the king of a small kingdom. He had gotten a “Cheating Code” of life and was able to complete something extraordinary. This is the story about a king that was able to conquer continents and leave behind him an ultimate legend that will be recited between every generation to come.

- Description from novelupdates

I possessed an extra character who is a villainess in a novel.

I tried to live a quiet life without getting involved with the main character.

“If you run away again, I’ll tie you up and take you to the palace.”

The second prince, who only looked at the original heroine, is obsessed with me.

“I didn’t do it for you, so don’t get me wrong.”

My self-proclaimed rival seems to have a crush on me.

“Ahh! She’s so beautiful!”

“If only I had been hit by her magic once!”

Suddenly, there is a fan club.

“Come, let us all pray reverently while looking at the picture of the noble Yerine.”

My favorite heroine became the president of the fan club.

…… Am I really the villainess?