MTL - Into Unscientific - Chapter 243 Classify the world line (thanks to the code-named black gangster for the reward

“I'll take this child.” Sold to the Wudang Sect's outer martial arts training hall for three silver coins at a young age, Kwak Yeon dreams of mastering supreme martial arts. But can he overcome the needle-sized gateway barely permitted to trainee instructors and rise to become a disciple of the main sect? “A true gentleman cannot stand idle in the face of injustice!” Thus begins Kwak Yeon's unyielding journey through the martial world, following the ruthless principle of “Kill Buddha, Kill Ancestors”—destroying all obstacles in his path!

In the beginning, when they all thought that she was “he”….

ML #1: We will be brothers for life!

ML #2: This time I’ll reluctantly let you have the #1 seat.

ML #3: I will properly repay royal teacher!

ML #4: Ah Rong is my closest little brother, I trust him.

Afterwards…

MLs: I’m seriously such a fool.

MLs: What do I do, I think I’m gay. I fell in love with my bro/rival/teacher….

Afterwards….

MLs: I’m straight! As straight as steel!

Note:
MC is a girl crossdressing as a boy, she knows how to fight, and naturally possess the gold finger halo from the author.

All the ML(s) is the same person, 1v1, sc, HE

- Description from Novelupdates

After dying in an oddly anticlimactic vending machine accident, Kazuki Ren is reincarnated in the demon realm—not as a hero, not as a villain, but as the only human male student enrolled at the mysterious Academy of Ruin, a school where all the professors are demon lords and all the students are powerful, beautiful she-demons.Ren is told he has one task: survive.But there’s a catch. The Academy’s darkest secret is about to awaken, and Ren holds a hidden power that could either destroy the demon world... or rule it.Now surrounded by seductive demons with hidden motives, eldritch tomes, forbidden dungeons, and twisted exams, Ren must master his ability—or be consumed.Magic, mystery, danger, and temptation await in this dark academia harem fantasy.

Dimensional Knights—legendary heroes who uphold order across the infinite realms. Wielding powers beyond comprehension, their purpose is singular and unwavering: to preserve the balance between worlds and defend against the ever-looming threats that seek to plunge them into chaos.Zane, a boy from Earth—one of the weakest and most forgotten realms—had his world forever changed the day he first witnessed the awe-inspiring power of the Dimensional Knights. In that moment, a dream was born. He wanted to become one of them. A hero. A symbol of strength and salvation.But fate had other plans.One tragic event shattered his world and dragged him into a downward spiral from which there was no escape. As the years passed, the dream that once filled him with hope twisted into something far more desperate. Becoming a Dimensional Knight was no longer about admiration or ideals—it became his only path forward. His only way to fight back. His only way to reach those who caused him immense pain and blood.Now, Zane's journey is not about heroism. It's about vengeance, survival, and rewriting the destiny forced upon him by those who wished for his death.Unbeknowst to him, this very path he was taking would change the order of the world forever.