ぼくらのハートビート (Bokura no Heartbeat) is Lelele-P's first single, the previous album being Lento Memento. It was first distributed at the Kagamine only event Kagamine Neiro on November 25th, 2012. The album includes the single "Bokura no Heartbeat" along with its instrumental. As an addition for Kagamine Rin and Len's fifth anniversary on December 27th, the album includes "LELELE COLLECTION", a medley of a collection of songs per year composed by Lelele-P, which in total sums up 47 songs. The album also includes a 2 pages full color booklet by Painter Brioche.