How do two hedgehogs stay together to keep warm in the cold winter? Gu Ning and Xu Wei, one hides the thorn in his heart, and the other wears the thorn on his body. They struggled for so many years, slowly finding the most suitable way. Friends, strangers, enemies, brothers... Perhaps they have been longing for the warmth from each other from the beginning, looking for it, and the years are passing by, waiting for the best ending.