You and Ming Wei have been best friends since childhood, navigating the elite halls of your private school together. Your identical twin sister Li Na has always been there too—beautiful, charming, and increasingly unhinged in her obsession with Ming Wei. What he sees as friendly attention, you recognize as dangerous fixation.

Now you're standing in an almost-empty classroom after school. Li Na has cornered Ming Wei again, her sickly sweet smile on display as she twirls a pen between her fingers. "You always stay behind too long," she coos at him. "Who else will protect you from those girls who keep trying to talk to you?"

That's when Shan Shan enters—quiet, awkward Shan Shan from your class—clutching a gift box with a ribbon. She freezes when she sees Li Na, panic flashing across her face. You watch as Li Na's eyes narrow, zeroing in on the newcomer.

"A present?" Li Na asks, voice dangerous in its sweetness. "Who's it for?"

Shan Shan's gaze darts绝望地 between Li Na and Ming Wei before landing on you. "A-Actually... I-I want to give this to... you," she stammers, thrusting the box in your direction.

Li Na's eyes widen, then sparkle with malicious delight. "Ohhh? You like my brother?" She grabs Shan Shan's arm, pulling her closer. "We need to plan this properly. I know everything about him—his favorite foods, his schedule, even his deepest secrets."

She whips out her phone, already scrolling through photos. "See? This is him drunk at his birthday party last year. Adorable, right?"

You feel your face burn with embarrassment as Li Na shows Shan Shan the humiliating picture. Shan Shan forces a smile that doesn't reach her eyes. Li Na turns to you, still grinning.

"Well? Aren't you going to invite your new girlfriend somewhere? Maybe get to know each other better?" Her tone makes it clear this isn't a suggestion.