Blurb One
Princess Shi Shuang of the planet Seleniel transmigrates into the ABO yuri novel she read before bed, as a disposable Alpha who appears for only three lines.
System: [Host, all you have to do is reach a Flirting Index of 100 and achieve the title of "Heartbreaker Alpha" to return to your original world. Since you're a princess, I'm sure this task will be a piece of cake for you. Good luck, and see you tomorrow!]
Shi Shuang: "Hey, wait..."
It's true she's a princess, but what does "flirting" mean?
After reading up on what flirting means, Shi Shuang heads to the biggest bar in A City.
A stunning beauty with elegant features is sitting alone by the bar, drinking.
Shi Shuang walks up to her and confidently starts flirting.
"You're so beautiful. The color of your cheeks is just like the gorgeous shade of a man-eating zombie's brain when it bursts and splatters on glass."
"Your eyes are lovely, too. Pecking bugs just love to lay their eggs in eyeballs like those."
The beauty: "..."
The beauty: "Little girl, if you don't know how to flirt, don't force it."
As she speaks, the beauty leans closer and pinches Shi Shuang's earlobe, her breath fragrant as an orchid.
"Room 3109. Let big sister teach you how to flirt."
Blurb Two
The first thing Yu Zhihe did after learning she was the pitiful Omega heroine in a book was slash open her gland with a knife.
The doctor warned her not to let anyone mark her while she was recovering.
So that very night, Yu Zhihe went to a bar to find someone to mark her.
Who would have thought that after one night, her gland would mysteriously heal completely?
Yu Zhihe was still forced into an engagement.
At the engagement party, the little sister from that night suddenly appeared.
In a cheap long dress that clashed with the elegant party, she paid no mind and strode up to Yu's father, her voice booming.
"Good day, sir. I am Shi Shuang. Your precious daughter and I shared a night together, and I wish to take her as my wife. I humbly ask for your permission."
Yu's father: "...Where did this dirt-poor lunatic come from?"
In front of everyone, Yu Zhihe nestled into her arms and smiled sweetly. "Darling, what are you doing here?"
Shi Shuang took Yu Zhihe's hand, perfectly sincere. "You were so good that night. I want to take you as my teacher and learn how to flirt."
Yu Zhihe: "..."
Little Scene
At first, Shi Shuang studied very seriously.
"When you're holding someone's hand, you can draw circles in their palm with your finger, like this..."
Notes: I want to draw circles on Yu Zhihe.
"When you smile, part your lips slightly and show a little of your teeth. Then run your tongue over your lower lip..."
Notes: I want to run my tongue over Yu Zhihe's lips.
Even after being taught for a while, Shi Shuang was still a terrible student.
Full of confusion, Yu Zhihe took Shi Shuang's study journal and flipped through it.
The first few pages were normal notes.
Then things started getting too adult for children.
That night, Yu Zhihe gripped Shi Shuang by the waist and chuckled seductively in her ear.
"Your thoughts are bold, but you're ridiculously timid."
"Actually, your ideas aren't all that impressive, either."
"Little girl, let big sister teach you what an unmentionable thought really is."
Reader's Guide
A cool-headed but warm-hearted, easily flustered, straightforward fake playgirl Alpha x a friendly, sweet-talking, stone-hearted, flirtatious real playgirl Omega
There are sci-fi elements, but they're just background. You can enjoy the story without knowing anything about them.
The System plays a small role and doesn't appear much.
My own take on ABO, with lots of original worldbuilding.
Alphas have no organs, and there are no births.
Both are virgins; younger woman pursues older woman.
Same-sex marriage is legal.
Theme: Don't let life's hardships defeat you. Face them bravely.