What Liu Youqing didn't know was that Wen Liu fell in love with her at first sight, and what Wen Liu didn't know was that the person he fell in love with first was Liu Youqing. The ignorant youth and the unspeakable love between same-sex people. Missing again and again, growing step by step. The final outcome may be a mistake that backfires. Those who cannot watch the sunrise together will never go to sunset together. This is a letter of confession.