Royal Secret: I'm a Princess! - Chapter 412

At 18, Alex Kain is whisked away to Eryndor, a game-like realm where he gains 'Skill Synthesis', a talent to fuse skills into godlike powers. Battling monsters and conquering dungeons, he builds a harem of strong women drawn to his might and charm. With the power to return to Earth bearing incredible resources, Alex faces a growing threat that endangers both worlds in this epic of adventure, romance, and ambition.

In order to live forever, the monkey left Huaguo Mountain, but strayed into the Hongmeng Farm, and was shocked into a fairyland.

“I don’t accept apprentices here, only tenants who farm the fields!”

“I’m born with strength, and I’m the most suitable for farming!”

So, he started plowing, farming, watering, weeding, killing insects…

Seeing that he was working so hard, Zhou Yu decided to teach him “The Transformation of the Stars” and teach him how to open up the universe!

- Description from novelbuddy

My reunion with her took place in the worst possible way.

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.