Xiang Nanjin & Jing Muxiu
In a key high school surrounded by camphor, two 18-year-old boys are both rivals and friends.
They are the names side by side on the top pick list, they are the most tacit opponents when solving problems, but they are also each other's deepest secret.
They solved all the Olympiad puzzles, but they failed to solve the mystery of the twinkle in each other's eyes that humid summer.
Intention: a promise
