Chrome Shelled Regios - Volume 2, Prologue

I was the Pope.I had ten years to save the world from destruction.I came close to death many times, saved the world, and finally returned to Earth…[Warning! If you do not reach the target number of believers within 90 days, your system will be reset!]“…Excuse me?”“What?”“…I’ve come to tell you about the good news of our Lord.”

All the people in the Tarot Empire know that the third young master of Le family is the most domineering, arrogant and beautiful Omega in the Empire. I don’t know how many alphas want him, but they dare not marry him. Now, under the order of the Imperial Marriage Center, this overlord flower will marry General Xu Yao, who is known as the ruthless Hell’s King of the Empire.

Tsk! It’s going to be fun!

So after X days of marriage…

Xu Yao: Butler, my wife hasn’t bullied you these days?

Butler: No, Madam is very kind, but he seems to think that you are a bit rude, he asked me to give you this paper.

It’s written:

~ Little Red Flower Agreement ~

Don’t swear a day, reward one little red flower.

Keep reading every night, reward two little red flowers.

Do good deeds, reward three little red flowers.

Get three hundred little red flowers, you can pa pa pa!

Xu Yao: Pei!!! You think Lao Zi is a dog in heat and wants to do it with you?!

After a month…

Xu Yao: Hurry! I still need three more, whose family is bankrupt this time? I’ll send a charity money, hurry! ! !

Cheerful, kind and virtuous wife vs Black belly and pampering husband, 1vs1, HE

- 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.

In the novels, all kinds supporting male leads are not only handsome but also talented. However, the existence of the female lead’s halo makes them lose their lives and properties!

In order to change this situation, male supporting role rescue plan officially starts.Gu Jinmi was inadvertently selected by the system. However, for her own happy future, she will work hard.

(There’s another novel with the same name but different author. The story is different too.)

- Description from Novelupdates