Heart is the fifth album by L'Arc-en-Ciel, released on February 25, 1998. It is the band's first album with yukihiro on drums, and marked the band's return to mainstream attention following the arrest of the former drummer sakura. It reached number one on the Oricon chart and sold over a million copies, being certified by the RIAJ.

The first single to be released from this album was "Niji".

All lyrics written by hyde, except track 9 by tetsu.

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