旧 On the Old Rain 旧时雨上 by Applications of Derivative Functions (导函数的应用) StatusOngoingLength1k WordsChapters1GenreRomanceEraModern EraUpdated3mo agoSourceJJWXC Request a translation Tags ThemeLovePOVFemale LeadAge18+ Synopsis Am I back from the dead? Wrong! Purpose: Cherish time Show more More by this author 几 Several Songs Applications of Derivative Functions