**"You said Xia Chan can't survive the winter solstice, but we can."**
Seventeen-year-old Dong Yu is cold by nature, like a handful of snow that never melts. He came from a political family, but he was obsessed with physics, and his alienation and impatience with the world were engraved in his bones. Until that midsummer, the "butterfly" under the sycamore tree fell into his eyes
Tang Yumi has a pair of light brown eyes, which seem to contain broken light when she smiles. He is the top student in the art class and the least valuable "commodity" in the nouveau riche family. A nightmare when he was eight years old left butterfly-wing-shaped bruises on his waist and planted the seeds of self-loathing in his heart.
When military training mixed them into the same dormitory, when Dongyu discovered the plaster patch Tang Yuxi had hidden under his white T-shirt, when Tang Yuxi suffered from an old injury in the middle of the night but clenched the corner of his quilt without saying a word - something frozen began to crack silently.
**"Dongyu, if I'm not clean anymore, do you still want me?"**
**"The laws of physics are about purity, I only want you."**
From the sycamore tree in Ningcheng No. 1 Middle School to the promise of taking the postgraduate entrance examination in the same city, they are like two stubborn summer cicadas, trying to resist the law of seasonal change. However, the demon that threatened Tang Yuhan reappeared, and the parents who used their sons in exchange for profits stretched out their fangs.
On the day of the winter solstice, Tang Yuhu ran towards his all with courage, but the black car crushed his unfinished confession.
Dongyu took the USB flash drive to the Swiss Bank with dried elm seeds stuffed into the jack. The screen flashed and a line of text popped up:
**"The password is your birthday, and the key is the Γ function you taught me that year."**
——It turns out that the purest soul has already been stored in eternity by his own hands.
Purpose: Oppose bullying and discrimination, oppose the theory of victim guilt, and learn to keep running towards the light
