Download MP3 [ENG/CHN/PIN] Zhou Yiran (周翊然) - The Secret We Know (你知道我知道) LYRICS/歌词 | Please Classmate 拜托了班长 OST Download Video [ENG/CHN/PIN] Zhou Yiran (周翊然) - The Secret We Know (你知道我知道) LYRICS/歌词 | Please Classmate 拜托了班长 OST