Lu Yu thought Gu Qing's smiling face had been buried deep in his memories over time, ever since he could no longer find any trace of him. Then they brushed past each other once again, and he saw those familiar smiling eyes.
Gu Qing had long since forgotten Lu Yu. But when he met Lu Yu again, all those days and nights they had spent together came flooding back to him.
Theme: The theme is that I don't know what to say either.