"Truth" is the tenth Japanese single (seventh under Warner Music Japan) released by CNBLUE. It was released in four versions: two limited CD+DVD edition, a regular CD Only edition and a BOICE Limited edition. Limited editions A and B and the first press of the regular edition includes a enclosed card with a serial code, one different per edition. The BOICE Limited edition includes 12 signed "Check" cards. Every edition comes with a different instrumental: Limited Edition A comes with an instrumental of "Still", Limited Edition B comes with an instrumental of "HEART song", Regular and BOICE Limited editions comes with an instrumental of the title track, "Truth". The BOICE Limited edition was only sold at the group's fanclub, BOICE.
