I have Immortality In The Cultivation World - Chapter 538 - 398: Complete Victory

Large-breasted, horny alien Empresses rule the galaxy. Julian doesn’t mind.He’ll go through every last one of them, fucking, conquering, if that’s what it takes to burn it all down.The Imperium of Archos invaded his planet.They razed it to ash.They killed the only girl he ever loved and then......left him to die.But then he found the Exion System, an ancient alien device built to make conquerors, not heroes.It bonded to his body and made him:THE GALACTIC KNIGHT.He’s not here to play hero. He’s here to burn the Imperium down.[Apocalypse System Activated]Host recognized: Galactic Knight.Command Authority: Unlocked.[Initiating Galactic Path.]Julian rises.He becomes a planetary governor.Then a warlord.But he’s not stopping there.He commands mech armies, crushes resistance, and spreads his reach across galaxies.Alien warlords, monolithic ugly monsters and cosmic gods will stand in his way, but they won’t stop him, he'll tear them to pieces!Planets of rivals will fall. Empresses will moan.And somewhere at the end of this blood-soaked path, the monsters who ruined his life will scream louder than anyone.They wanted war.He’ll give them hell.And he’ll make sure they watch him become the apocalypse they awakened.[CAUTION!][STRONG SEXUAL CONTENT.][BRUTAL, INTENSE AND BLOODY BATTLES]

Xue Xi is forced to fall in love at first sight with this dangerous man on their first meeting. With death being the only other option, she makes the first move:

She found that her fiance was sick and squeamish, but it was a little expensive to raise.
The poor and poor high-level bosses have to make money to support their husbands while accumulating merits.
Then, he went to the construction site to move bricks and was caught by his husband. He set up a stall at the door to tell fortunes and was carried back by his husband. He went out to catch demons and was carried back by his husband.
The big devil is very distressed, what should my husband do if he always wants to keep her at home?
Yu Chao is rich and Huaizhi is helpless, what should the little girl always like to go to dangerous places?

- Description from novelbuddy

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