My Wild Beast - Chapter 20: Skywards

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.

This novel is also known as The Demons Beside Me

Chen Zhao can summon demons and see Death.

“Beelzebub, use your Gluttony ability to treat this patient’s anorexia.”

“Raymond, this old man wants to regain his manly function. You know what I mean.”

- Description from Novelupdates

Absurd! Reincarnating as a newborn in a demon-infested world, the overturning system arrived 30 years early.[At 30, after enduring endless hardships, you have achieved nothing and remain a loner. Reward: Late Bloomer (Talent) - Effect: The older your bones, the faster you cultivate.][Overturning mission: Defeat Chen Yuan at the sixth level of the Guiyuan Realm within a year. Reward: Swordsmanship entry-level]One-year-old Chen Yi looked at the content on the panel, then down at his small arms and legs, falling into deep thought.'Damn! This system definitely arrived too early!''I'm only a year old, what good is the Late Bloomer talent now?''And Chen Yuan of the Guiyuan Realm...'...Years later, war reports came from the frontlines.'The Tianyuan Continent’s top ten martial arts prodigy, Champion Marquis of the Wei Dynasty, the Amorous Young Master, Sword Saint Chen Yi, slaughtered 100,000 demons on the battlefield of Taizhou Mountain to celebrate for the human race!'However, Chen Yi looked at the battlefield flowing with rivers of blood and shook his head:'I’ve been making overturn since I was one, experiencing countless life and death situations to achieve my current cultivation level. It’s not surprising you can’t resist!'Those 'life and death' crises were terrifyingly daunting.The big brother at one year old, childhood sweetheart at five, senior brother at ten, princess at a tender age...Who understands my hardships?PS: Infant stream, system-arriving-early stream, light-hearted, humorous, passionate.PPS: Also known as 'Starting the Overturn as an Infant', 'Reborn as an Infant, What an Overturn! ', 'Talking is Useless, It's Time to Fight.'