Citadel for All: The Only Unit Angel at the Start of the Game - Chapter 564

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.

As we all know, there is a force that must not be messed with in the Southern Region, thatched cottage.

Among them, the eldest disciple is the Qingyun Sword Master of the Southern Region, with a mastery of swordsmanship.

The second disciple, the Eternal Empress, leads an era.

The third disciple is a great Confucianist in the world, and the star of Wenqu came down to earth.

The fourth disciple, the reincarnation of the demon god, suppressed Jiuyou.

…

Lu Changsheng: Me? I am nothing special, just their master.

- Description from novelbuddy

With the invasion of foreign races, the online game, Divine Realm, fused with reality and caused the real world to become digitalized.

Everyone could awaken their own talent and raise their levels and strengths inside Divine Realm to defend themselves against foreign races.

During the invasion, Lin Feng, a divine level expert of the Dragon Country, was betrayed and murdered by Qianye Yuan, the divine level guardian of the Island Country. After his death, Lin Feng woke up and realized that he had reincarnated back to the time just before he entered college, a day before the talent test for the Divine Realm game.

He had awakened the SSS-grade talent, All Methods Known, that no one had ever seen before.

He could master the abilities of every class and could use experience points to level up his abilities. To make it even better, there was no growth limit for his abilities.

[Jade Emperor’s Immortal Body: Double all basic attributes with each level up.]

[Space Traveller: Able to move freely through spaces (500 + 50% magic attack) x Skill Level / Effect Range.]

[Frozen Ice Shard: Launch an ice spear. The ice spear will explode after hitting an enemy, causing 200% magical damage to the enemy. The ice shards will spread out and damage all enemies within a 30 meters radius, causing 80% magical damage to the enemies. Enemies hit by the skill will be affected by a 50% speed reduction for 1 minute.]

[Blazing Tempest: …]

The 7-year-old little crybaby met 11-year-old big brother who ran away from home.
[This man became the protector of redemption in his life]

The 16-year-old little dragon fell in love with a 20-year-old big brother.
[It’s a pity that the big brother didn’t recognize him as the little crybaby]

The 23-year-old single father and 27-year-old chief executive meets again.
[This time the little crybaby and his big brother are finally together]

Fortunately we met through hundreds of millions of people, Thank God, for letting us break through many obstacles and get back together again, falling in love with you and being with you again is the greatest fortune in my life.

- Description from Novelupdates