The pure, aloof only son of the Shark Emperor x the War Emperor, who seems passionate and outgoing but is actually ruthless and violent
The male lead is a merman. The female lead is genuinely ill, and the tyrant has her reasons for being one. The female lead isn't a good person, but she doesn't kill the innocent.
Male pregnancy
Qin Zhi's father was miserable in the palace, and finally passed away when she was ten. The daughter of a disfavored male consort was so insignificant among the Empress's twenty children.
She had no interest in the throne and despised all the scheming. There was nothing left to keep her in the imperial capital.
In the thirtieth year of the Zhaohua era, Qin Zhi followed a valiant general to fight in the Northern Territory. At the time, no one had faith in this unremarkable seventeenth princess.
In just three years, Qin Zhi's name thundered through the ranks of the frontier generals. This time, it wasn't because she was a princess, but because of her astonishing achievements.
The Empress made her Prince of Liang and appointed her to defend the border. Qin Zhi remained unmoved. The struggle for the throne was nearing its end, and the capital's hidden arrows were pointed at her. Qin Zhi didn't care. She was more than capable of protecting the people of Hancheng and the comrades who fought beside her.
What did the throne matter? Nothing could give her a moment's peace like the thrill of slaughter on the battlefield. Qin Zhi had no intention of fighting for the throne, but the only two princesses left didn't see it that way. They were constantly afraid that the God of War on the frontier might suddenly march back to the capital.
As they feared, Qin Zhi eventually chose to return to the capital and become the tyrant of her age...
The tyrant liked to have the final say, and her specialties were wiping out families and executing people. No one dared say another word about the imperial consort being a merman, the impurity of the imperial bloodline, or the Empress's tyrannical rule. None of it mattered as much as keeping their heads on their shoulders.
Yet they gradually discovered that the crumbling State of Zhao was flourishing under the tyrant's rule, with all nations coming to pay tribute...
When she first met him, the scars covering his merman tail were horrifying.
Qin Zhi cared for him for a long time before his tail finally regained its luster...
But the bitter north was truly unsuitable for him. She wanted to send him back to the sea and set him free, but she never expected him, still babbling like a toddler, to speak his first words.
"I'm not leaving." Those three brief words echoed in her lifeless heart, melting the snow that blanketed the world.
After failing to send him back to the Eastern Sea for the third time, she finally laughed in exasperation.
She glared at his feet, covered in tiny cuts, burning with anger. It had taken so long to heal his wounds, and yet he was so careless with his body that he had risked everything to sneak back.
"Fine. If you don't want to leave, then you'll never leave." She picked him up without a shred of tenderness, tossed him onto the reasonably soft bed, and drew the curtains.
Theme: If everything is good, then everything is truly good.