I also wrote the Mandarin lyrics for this.
Original: by Chasing Fireflies https://www.youtube.com/watch?v=xeBAF9qZ1js UST is from original as well.
Main vocal VB: 夏語遙 http://www.voicemith.com/ Chorus VB: 雨月 https://tll555.wixsite.com/index/uzuki
covers /