Isekai Maou to Shoukan Shoujo Dorei Majutsu - Volume 1 Chapter 1.12

It took a long time for Yu Qingjia to learn that she was the original heroine in a Mary Sue Novel, and the other party held the female supporting system in their hands, and She was gearing up to grab her opportunity.

Hehe…

Anyway, sooner or later, she’s going to die, so it’s better to live a more comfortable life. Yu Qingjia completely let herself go, relying on her status as a legitimate daughter, she played her life against her father’s new beautiful concubine. This little concubine is not a good stubble either, as they come and go, the relationship between the two of them becomes bigger and bigger. Later, she gradually realized that something was wrong.

Why is her formidable enemy a ‘man’?

He is also a wanted man of the royal family, the youngest son of the deposed prince, and a famous tyrant in the future!

The royal family of this dynasty has a secret. For example, although these royal men are all beautiful and good at fighting, they are bloodthirsty, paranoid, and cruel from their genes.

Murong Yan fell from the clouds into the dust when he was young, and even had to disguise himself as a woman to avoid spies in the backyard of his followers. After great changes, the tyrannical element in his body could hardly be controlled until he met Yu Qingjia, his nominal “daughter”. In his restless and dark world, the sun suddenly radiated in.

- Description from Novelupdates

Jeff Anzon, a young man who had just turned 18, was instructed by his father to inherit their family's fortune. He was stunned by this news since what was he going to inherit - their old wooden house? He didn't argue and decided to go back home since he missed them.But a huge problem occurred when he went to the airport and boarded the plane. During the flight, a weird phenomenon happened. Even though it was a bright and sunny day, suddenly it turned stormy, dark, and rainy. As the plane crashed to an uncharted island, Jeff found himself stuck on this island.So, what should he do? Of course, move on and build shelter. Luckily a suitcase floated before him, and he saw an axe inside. As he chopped a tree, he was stunned by the sudden occurrence.

Transmigrated into the world of High School DxD, Roy believed he had been handed a life of luxury and glory. Born into the prestigious Lucifuge family, with his Sister Grayfia as his strict yet devoted older sister, he thought he was destined for greatness. 99,997… 99,998… 99,999… 100,000!!But... reality proved harsher: Roy lacked demonic talent and, despite years of training, remained a Low-Class Devil. his peers effortlessly achieve High-Class status, he’s been trapped in a cycle of endless sword practice and ridicule. Yet, he refused to accept mediocrity. Ten thousand sword swings a day, relentless training.. Until one day..[Ding! The Strongest Demon King System has been activated. Access functions to learn more.]---- High School DxD - Main World!1 - High School of the Dead [●] - First2 - Demon Slayer [●] - Second3 - Akame Ga Kill [●] - Third4 - Bladedance of Elementalers [●] - Fourth5 - Campione [●] - Fifth

Every human on Earth was transformed into a summoned monster and was summoned to another world.