Redemption from the Abyss: The School Beauty Insists on Pulling Me Out of the Mire

(Rating just released, will rise later) [Mutual redemption + Single female lead + Campus slice-of-life + Pretending to be a bad student + Sweet romance]
Xie Wang felt that he was destined to be like moss rotting in an old, run-down neighborhood for the rest of his life.
His father was an alcoholic and in debt, and his mother died young. To survive, he used his exceptional computer skills to navigate the gray areas, living like a shadow in the gutter.
At school, he was the "sleepyhead" who consistently ranked last on the list, and a black sheep in the eyes of the teachers.
He thought he would rot away in loneliness like this, until that rainy night—
Xie Wang found Su Qinghe, the most admired person in the entire school, among the pile of moldy junk in front of his house.
The young lady, who was usually impeccably dressed, was now soaking wet and hiding in a dark corner of his building's stairwell, looking as disheveled as a stray cat.
She didn't cry, nor did she cry for help; she simply looked up at him with her still clear and stubborn eyes.
"Xie Wang, don't send me away."
Give me a reason.
"I have a home, but I can't go back."
At that moment, Xie Wang saw the same loneliness in her eyes as he did.
……
Later, someone asked Xie Wang why he spoiled Su Qinghe so much.
The boy, who always had a cold expression, looked down at the girl sleeping soundly, clinging to him like an octopus, and a slight smile appeared on his lips:
"Because it was raining heavily that day, she didn't go anywhere and only dared to hide behind me."
"Since this world is so rotten, let's be each other's only refuge."