MTL - I Know Everything - Chapter 14 Close shop and open?

The mountain village boy accidentally got the fairy gourd, and he rose step by step to cultivate immortality and longevity.

Ripe elixir, mortal flow.

- Description from novelbuddy

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.

“I’m going to adopt a child.”Duke Ferio Voreoti’s impulsive decision shocked everyone in the mansion.Not only did he make her his daughter, but he also gave her the name of a ‘beast’ that only direct members of the bloodline could receive.“Even as you breathe right now, I’m earning money.”“It’s confidence, not arrogance.”“My face really does have its advantages.”The most arrogant father in the whole world, and“I love muscles the most. Let’s get muscular.”“Show me your thigh muscles! Your bu*t would be even better!”“You’re nothing but a flower if you have a calm personality…”his corrupted(?) daughter.And…“I will give his excellency the information he wants most.”“Information I want most, you say…”“You won’t regret it.”…A stepmother(?) with a strange secret as well.

In the vast and boundless continent Cangtu, there were ancient sects governing the Ten Old Domains, unworldly immortal clans beyond the Blue Sky, and primordial demon gods dominating the dark abyss that together created a great number of brilliant stories over the long course of the history.