Wutang Koichi

A diary quietly picked up by her mother revealed the secret she had hidden for three years. He was the unreachable moon in her youth, and she was the heartbeat that he had hidden for three years before he dared to admit it. When the concentric lock engraved with the dates of first meeting and farewell appeared on the school rooftop, all the "coincidences" and "misses" buried by time finally came to light - it turns out that the deepest love is that each other thought the other never knew. She spent the entire high school practicing saying goodbye, and he spent many years silently remembering her, and finally completed a grand, unwitnessed two-way rush in the misplaced time and space.