Oh no! My yandere school beauty is so clingy!

[Single female lead + no system or cheat codes + slice-of-life story] (Rating just released, will rise later)
Everyone in the school knows that the gentle and generous Lin Anran is incredibly difficult to win over.
She wouldn't even glance at the love letters that filled her drawer, and she rejected all confessions of love.
I originally thought she was just a good girl who didn't want to be in a relationship.
Until someone sees it—
After school, Lin Anran lingered next to class monitor Shen Yu, sticking close to him and impossible to push away...
Everyone is guessing: What kind of magic did Shen Yu use?
"Is he incredibly romantic? Does he send flowers every day?"
"He must come from a wealthy family, be a second-generation rich kid, right?"
"It must be because of his good grades, the aura of a top student!"
Unbeknownst to them, Shen Yu's school uniform pocket contained a note that Lin Anran had secretly slipped in that morning:
This is the 52nd time I've thought of you today. There's a piece of candy I once sucked on inside the candy wrapper...
They were even more unaware...
At night, Lin Anran would sneak into Shen Yu's bed, bury her face in the crook of his neck, and sob softly.
"Shen Yu... that girl looked at you for three seconds today..."
"So I'm punishing you... by making you kiss me for thirty minutes..."
"Otherwise, I'll make that girl pay the price..."
She would count his eyelashes as she fell asleep, and would bite his shoulder in her half-awake state:
"You are mine..."
"Everything, from head to toe, even the strands of hair..."