Cold-blooded Undercover Master - Chapter 25 Extinction Again

In the fantasy world ruled by Matriarchy, Kael of the Ancient Moonstone House, was working as a guild receptionist. Throughout his life, he was protected by his mother and later, younger sister, who was considered one of the highest potential individuals in the Queendom of Elyria. One day, he hears that his sister has gone missing and his family has accumulated debts of over 127 million gold coins to the Bank. The Queen comes to his rescue, paying off his debts and in exchange, he has to marry her five daughters, who each excel in a domain of their own.Having the five imperial princesses and the Queen herself as the backing, Kael has become one of the most protected individuals in the Queendom. Little did his wives know that Kael had another identity. He is the most dreaded yet noble Assassin of the imperial city, “K,” one who hunts down the criminals who escape punishment either because of insufficient evidence or using their connections.Follow Kael's journey, as he navigates his life as the protected figure in the light and protector of justice in the shadows.

The rivers and lakes carry wine with swords, the waist is slender and the palm is light.

The young man carried a long knife on his shoulder, and hung wine on his waist, striding forward, but the rivers and lakes in his heart were vaguely visible.

Turning a page in the book of troubled times, the rivers and lakes have been raining nightly for decades.

Looking back suddenly, the world has been shattered.

- Description from novelbuddy

An Individual from Earth finds themselves in the Shinobi World, equipped with a Scientific System. From that moment, he delved into scientific research far ahead of its time.

Wen Zhi had a treasure, which allowed her to enter other people's dreams.Therefore, on her first day residing at the Shang family residence, she decided to explore Lady Shang's dreams first, to curry favor with her by pandering to her preferences...But an accidental bug occurred, and the person who ended up sharing Wen Zhi's dream was the person in charge of the Shang family, and her best friend's cousin, Shang Hexing!To figure out whether it was her own dream or a shared one, Wen Zhi discreetly told her best friend, “Your cousin has a red mole on his chest.”Her best friend, horrified, warned her, “My cousin is an unattainable flower, cold-hearted and solely focused on his career. There's no future between you two.”Wen Zhi was relieved. This must be her own dream.Recently, Shang Hexing had been troubled by frequent dreams at night.In those dreams, the same woman always appeared, with a delicate and soft body and a sweet, mellow voice that completely mesmerized him.It wasn't until he noticed that the young girl his mother had taken in was recently looking at him with panicked eyes...