MTL - So Pure, So Flirtatious - Chapter 25 I am your wife.

Ding! The system activated the mission!

[Look at this sick old man in front of you. Let us pull out his oxygen tube and send him off. Let’s give him a peaceful mercy teehee~]

Shinomiya Aoba was stunned.

The old man mentioned by the dog system seemed to be a little strong…

Looking at the Gedo Mazo Pipe inserted in the back of ‘old age Madara’, he was silent and even wanted to laugh.

What do you mean his ‘oxygen tube’?

You want me to die?!

In addition… The super su*cide missions have been released:

[Personally experiencing the ultimate meaning of the Eight Inner Gates! —Take a hard kick of ‘Night Guy’ and shout out, ‘I would not call you the strongest!’] [Give Otsutsuki Kaguya a Thousand-Year Kill! —And record this beautiful moment!]

[Art is Explosion… and SpongeBob Squarepants! —-To accompany Deidara to self-destruct!]

[Inviting Terumi Mei to host the wedding —No less than a hundred words of congratulations!]

In addition, there were many other kinds of death-seeking missions waiting to be opened. And when the main character looked back many years later, everyone was holding back a sentence of “Damn it, he’s crazy!”

“This Ninja clearly didn’t look very strong, so why did he not die even after doing this?”

This was probably a poor child who had been dragged onto a path of death by a shitty system that’s set on seeking death.

He was a Martial Arts prodigy, a master of using poisons!He descended the mountain to search for his junior sister but unexpectedly became the School Beauty's bodyguard… From then on, a demon-like student was born! He pursued the School Beauty, took down bullies, and was revered as the supreme ruler of the city! He cultivated Ancient Martial Arts, annihilated formidable enemies, and swept across all directions to ascend to the Peak.

One day, Luo Jian woke up from his sleep and found himself in a locked chamber where the door and window were all sealed. A note with a few lines written on it was tacked to the wall: “Escape from this room within an hour, otherwise, you will die.”

There is a sequel called Reincarnation Night (轮回之夜) that takes place in the same universe but has different main characters

- Description from Novelupdates

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.