Xu Wan is a messy girl. Smoking, fighting, and bullying her step-sister are all her daily routine during the summer vacation.
She hates her sister named An Ran, hates that she always gets her parents' favor easily, hates that she always wears that gentle mask of not being surprised at all changes.
Therefore, she deliberately poured hot porridge on her and deliberately asked gangsters to block her in the alley.
But when the real danger approached, the sister who had the porridge thrown on her stood in front of her, grabbing the broken bricks with her bare hands, and in order to protect her, she made a shocking bloody gash on her forehead.
In the hospital, Xu Yuan cried and knelt beside the hospital bed, holding her cold hand, trembling all over.
"Can you... Don't hate me."
An Ran didn't blame her, just touched her head gently and said with a smile, "Because I am a sister."
Later, every night in his senior year of high school, Xu Wan would call An Ran who was far away with math problems that he couldn't solve.
She always talks hard, but she doesn't know that her heart has already been softened by that cup of hot milk.
Concept: Beautiful love between girls