いつしか、必ず。 (Itsushika, Kanarazu.)

If You Live, You Will Be A Liar is a song sung by Miku Hatsune and Rin Kagamine. It is the two-hundred-and-seventy-first track in Other Vocaloid Songs 10: Luka And Rin and the eighty-fifth track in Other Vocaloid Songs 19: Greatest Hits Of Miku Volume 3.