Hologram is the first Japanese extended play by South Korean singer Key.

Key made his debut as a solo artist in November 2018 with the studio album Face.

[5] Lead single and title track "Hologram" is retro-inspired, setting the tone for the rest of the EP.

"Why Are You Here" is a duet with CoCo, and the lyrics concern romantic misunderstandings between a man and a woman.

"Power" was written and composed by L'Arc-en-Ciel member Tetsuya, and is described as "hybrid rock groove".