Often in quiet nights, I turn off the lonely lamp, listen to the drizzle, and recall the laughter of good friends in the past. Sometimes, Zhou Changyi couldn't help but wonder, if it weren't for his sister's joy and if he hadn't been so stubborn in the past, everything in his world would be different now. Zhou Changyi was so obsessed with nostalgia, but even she didn't know that what she feared the most was actually the old friend she had reunited with after a long separation and the old dream she regretted not completing.