Su Ran, the ever-changing school beauty, receives love letters every day, until one day a senior student completely breaks her peaceful life.
Ye Jinghan, the handsome iceberg boy, was Su Ran's childhood sweetheart and became her only confidant after that.
They stood the test of time and eventually reached a reconciliation. The senior's voluntary surrender fulfilled the sweet love of the childhood sweetheart. Maybe it wasn't until then that Su Ran truly realized that she had always liked Ye Jinghan.