Monster Musume Harem wo Tsukurou! - Chapter 69: Returning to the academy

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

Before Wufu was reborn, she had no idea there was such a thing as rebirth. Only after her rebirth did she realize Heaven must have thought her previous life was too smooth, so it sent her to suffer in this ancient land where morality, decency, and the Female Precepts were held in high esteem, pitiful indeed! From being a master jade carver to having her soul transmigrate into a farm girl with a wretched background, she was bullied and humiliated. Even the bun-selling mother advised her that forbearance is gold? Bullshit! She could endure, but her other identity absolutely could not—robbers, swept away; insults to her mother, you're crippled... Wufu has a saying, for every insult and humiliation, I will repay a hundredfold. But what's with this one? He doesn't bully her; he only wants to sleep with her? And he even dares... to mount her? Well, a lord can endure, but Wufu cannot. Mount him back, life or death, a hundred years, neither owes the other anything!

The land of Aleisterre is a world of might and magic, sword and sorcery, where wandering knights and mysterious gods shape the fate of kingdoms. Wang Yu, a resourceful and unorthodox protagonist, finds himself inexplicably pulled into Aleisterre, a place steeped in ancient powers and political intrigue. With little understanding of the magic and faith that underpin this realm, Wang Yu is thrust into conflicts he never sought out—yet must navigate carefully if he’s to survive.Official blurb:Dragons' wings cut through the sky. Knights charge forward, magic tearing apart everything before them. Wizardry distorts the fabric of reality itself. The steam revolution stirs in one kingdom; the endless seas echo with ancient, distorted calls. Gods rule from high above, and the dark abyss leads deep underground.Wang Yu, from Earth, arrives in this unfamiliar world of fantasy.Straightforward and practical to the extreme, Wang Yu hates politics, despises intrigue, and prefers to approach everything head-on. In his own way, he leaves his mark in this mad, chaotic world.“I don’t care to listen to or understand my enemy’s story.”“I'm the tank, and you're the carry. Together, we'll be invincible.”“A man’s got to have a sense of himself, more than anything else.”Armed with an iron hammer and unbreakable will, he smashes through every obstacle in his path.

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.