That Year, Under The Starry Sky

Briefly about That Year, Under The Starry Sky manga:

Lin Yin and Xing Yu are childhood playmates who promised to be together forever under the starry sky, however their innocent wishes were temporarily frozen by reality. Many years later, Lin Yin transfers to Xing Yu's school and on her first day she unexpectedly becomes wrapped up in a situation that left her at a loss for words. Amidst this chaos, Lin Yin meets up with Xing Yu, who appears before her like a dream.