Ever since Song Yuyi could remember, Cheng Yu had been filling every aspect of her memory.
Cheng Yu is one year older than her.
In her second year of high school, Cheng Yu successfully advanced to the third grade of high school.
She didn't realize what this meant at first.
Until winter comes.
In that difficult winter, Cheng Yu's company was like a hot summer breeze, making Song Yuyi feel like warm spring.
Mission: Persistence is victory
