"Kokoro Komete" (心こめて) is Becky's debut single under EMI Music Japan, released on December 2, 2009.

It is the first single where she is credited under the name "Becky♪♯" (ベッキー♪♯, Bekkī♪♯, with the eighth note and sharp).

The single is her first to debut in the Top 10.

[1] One of its B-sides "Hapi Hapi" (ハピハピ) was used as the opening theme for Crayon Shin-chan.

[2] All lyrics are written by Becky♪♯ This article related to the music of Japan is a stub.