This is the English subtitled version of: Song#28: 愛言葉 (Love words) from Hatsune Miku 39's Giving Day Concert. Trivia: The concert was held on the 9th of March (3/9) because 3 and 9 can be pronounced "sankyuu" in Japanese, which is the japanised version of "thank you". There are also a total of 39 songs in the concert! Very nice planning by Project Diva and SEGA (and whoever else is responsible