Wraithwood Botanist - Chapter 7: Poisoned

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.

Shen Dongqing is a powerful, thousand-year-old ghost. He had just possessed a body and hadn’t even relaxed for two days yet when he was pulled into a white, parallel world.

On the first day of the Infinite Nightmare Game:
Other players tremble, crying and wailing wanting to go home.
Shen Dongqing eats, sleeps, and plays ‘Fight the Landlord’ (card game).

The second day:
Other players are chased endlessly by ghosts, crying loudly ‘Save me!’
Shen Dongqing eats, sleeps, and plays ‘Fight the Landlord’.

The third day.
Shen Dongqing……
The ghosts finally set their sights on this lazy player. The other players watch on in glee. As a result, who knew that this slim and pale youth would stand up and easily dispatched the ghosts with his bare hands.

Other ghosts: Can’t afford to disrupt this elder. Let’s go, let’s go.

- Description from Novelupdates

After sleeping for over two thousand years, she woke up, only to find she had lost everything and was even going to be sold at an auction by her father.On her way to escape, she met him by chance. He was so handsome and adorable, like a cute little dog. So they got married in a flash.Later, she accidentally met the first interstellar commander whose mask had fallen off. Rumor has it that anyone who sees his true face will die. She trembled with fear, “What a coincidence! You look exactly like my husband!” He said, “I am your husband.”From then on, he clung to her every day, wanting to have a child. She felt regretful: He looks like a wolf now! She misses the little puppy she used to have so much...

Feng. Liu Di is a city in the city. He has only one mind in mind:

I am the king, where do you live? !!

- Description from 69shu