After traversing to the apocalypse, I am extremely delighted as a Demon Cultivator - Chapter 7 - Are you okay? You’ve made your parents uneducated.

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.

A mysterious teenager who had lost his past, awakened in Tianlong Continent. Mistaken as the Ye family’s Son, he used this identity to observe this chaotic world and to search for his past self, but only to find an inevitable and terrible fate, therefore he indignantly laughed at his destiny, and revealed his prowess to rule the lands under the heavens.

Since then, the air and the clouds moved with his hands, and even thunderstorms were subject to his palms! He, as the fairytale’s main character, had shocked the people of Tianlong Continent with his legendary prowess and intelligence, but the extent of his powers were still unknown.

- Description from novelupdates

Jeanne was only 18 years old when her stepmother and step sister framed her and caused her to lose everything. She was thrown out of the house by her father for trying to resist.

7 years later, Jeanne came back for vengeance with a mysterious son by her side—George.

People mocked her for being a single mother and called her son a fatherless child.

“Who are you calling a fatherless child? You wouldn’t like me when I’m mad,” George threatened.

“Lay low, George! Don’t ruin the fun! I haven’t had enough,” Jeanne said as she wanted to enjoy her revenge, leaving the boy speechless.

Jeanne later met the infamous Fourth Master Swan at a charity ball. The man with the handsome looks and cold temperament called her to a corner and said, “I like you.”

Everyone was shocked, including Jeanne.

“I’m a single mother and I have a child. Are you sure you like me?” she said.

“I actually… like your child!”

Everyone else was shocked when Fourth Master Swan married Jeanne but only his sly self knew that he had gotten not one, but two, important players to this chess game that he was playing.

This is a world where humans, demons and mysterious beasts coexist.

Humans cultivate mysterious qi. Demons cultivate corporeal bodies. Mysterious beasts cultivate soul perception.

A legend says that in the middle of an endless rainforest, there are extremely powerful existences; they are called demon kings.

Some demon kings have a tyrannical corporeal body, some are experts in illusions.
Some demon kings are proficient in magic, some can even move mountains.
Some demon kings are able to sense things thousands of miles away.

These demon kings rarely appear in the human world. Even if they emerge in the human world, they would reincarnate in human form; assimilating with mankind while seeking to breakthrough realms…

- Description from Novelupdates