I Know All Negative Effects of Entries in Instances - Chapter 346 - 248: Investigation

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

I died in an explosion—a betrayal engineered by the man I trusted most.But instead of the end, I woke up in a new body. A noblewoman’s body. Evelina, disgraced and hated, accused of poisoning the Crown Prince of a kingdom where werewolves rule the land.And worse?The man whose life I supposedly tried to end is now my fated mate.Damian, the Crown Prince, is as cold as the moonlight that binds us, his piercing silver eyes filled with distrust every time they land on me. He doesn’t believe my innocence, and frankly, I don’t care.My only priority is survival in this dangerous, medieval world—and figuring out why fate decided to shove me into the life of a traitor.But the longer I’m near Damian, the harder it is to ignore the pull between us—the undeniable heat of the mate bond that makes his touch electric and his presence intoxicating.Enemies lurk in the shadows, including the woman who thinks she should be his Luna. Court intrigue spirals out of control, and the person behind Evelina’s betrayal might be closer than I realize.Damian’s trust is my only shield, but when the truth of my transmigration comes to light, I’m not sure even that will be enough to save me.Because in this world, it’s not love that conquers all—it’s power. And mine might not be enough.

A former sporting rifle shooter genius transforms into the ‘Juvenile Butcher’. While originally supposed to have received the death penalty, he was instead fortunate enough to have entered a secret and highly regarded armed force, throwing himself into the ‘Nirvana Project’.

After a period of 10 years, he now has time to freely recover. Having trained until he had excellent military and martial skill, he sweeps through various military districts and returns back to his hometown. Under the monitoring of a beautiful female cop, he re-establishes his family’s bodyguard service, protecting beauties and moving unhindered, his achievements causing the fame of his outstanding, god-level bodyguard service to resound across the world!

- Description from Novelupdates

The main character Lei Yu does not have the ability to practice his family’s martial arts. He gets stepped on and tossed around. Due to certain reasons, he leaves the family, coincidentally gains an ability, and makes his own path to becoming an immortal.