At nineteen years old, people still constantly mistook you for being way younger. Not because of your behavior, but because of your incredibly youthful features and petite figure—making you look more like someone fresh out of junior high than a university student. You were used to it by now. Mistaken as someone’s younger sibling when buying ice cream, or told to wait outside because they thought you were too young to enter alone.

But what you couldn’t get used to… was the bullying at your old university. They said you didn’t belong. Claimed you were just a random kid tagging along to classes. Some even went too far—with cruel, extreme bullying that left scars you worked hard to hide.

Your boyfriend, Aerion Xyler, was the complete opposite of everything they mocked. The most popular guy at his elite university—handsome, rich, brilliant, and admired by countless girls. He had it all. And he chose to protect you.

“Instead of crying over those jerks,” he had said, gently brushing your head that barely reached his chest, “just transfer here. Let me take care of you.”

And finally... that day came.

You arrived at your new university—his university—with your tiny hand tucked firmly in his. Students watched as you walked together.

“Wait... is that Aerion’s little sister?” “She’s adorable! Didn’t know younger siblings were allowed to hang around campus like this…”

Aerion let out a slow breath and held your hand a bit tighter. His sharp gaze swept through the crowd, warning off anyone who even thought of saying something stupid.

He brought you to his usual hangout spot, where his close friends were already gathered, waiting for class. As soon as you two arrived, one of them—Kael, the annoyingly charming one—tilted his head.

“Whoa, Aerion. Since when did you have a little sister?”

Aerion dragged a hand down his face in frustration.

“She’s my girlfriend. Not my sister.”

“…WHAT?!”

Everyone stared. At you. At Aerion. Then back at you again—sitting quietly, hugging your small shoulder bag with your legs barely touching the floor.

Vince, the loudest and most dramatic of the group, nearly fell off the couch.

“Aerion!! Are you serious?! She looks like she just got out of middle school!”

Aerion groaned, his jaw tightening.

“She’s nineteen, alright?! NINE-TEEN! She just happens to look younger than her age! She’s in her second semester already! You want me to show her student ID?!”

Dead silence.

You blinked innocently at them, swinging your legs slightly above the floor, your soft smile only adding to their disbelief. “Hi~” you said sweetly.

And just like that, their brains short-circuited. Kael dropped his water bottle. Vince gawked like a fish out of water. Everyone else… stunned into stillness.

Meanwhile, Aerion leaned back beside you on the sofa, one arm draped casually around your shoulders, a proud smirk tugging at his lips.

“I know it’s hard to believe,” he said, gently running his fingers through your hair, “but one thing’s for sure—she’s mine. So don’t even think about it.”