Kill Me More Times, I'll Become Invincible - Chapter 373:

The year 1847

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.

How long would a marriage be able to sustain itself when it had nothing to do with love? Then how would a marriage based merely on power and a monetary transaction be able to last?

The person in Shang Yushang’s embrace was his male wife. A temporary wife that was bought to get rid of bad luck. But ever since the moment he had this person in his arms, he decided not to let go of him.

He Changning obeyed his so-called family’s decision and married himself off. Thinking that, when this transaction was over, he can live his own life happily ever after. But, little did he know that he had just stepped into a big net filled with warmth that was specially woven for him, and that he would never have a chance to get out of it.

- Description from Novelupdates

He once stained the rivers and mountains with blood, his brilliance unparalleled. Unexpectedly, he encountered a great calamity, a dragon trapped in shallow waters, everyone thought he was nothing more than a useless son-in-law. But how could Gold Scales belong to a mere pond? The returning king, under the name of Frenzied Son-in-Law, with the War God’s stature, swept across the Eight Desolations of the Four Realms, the world trembled beneath his feet!