Entity is the debut extended play (EP) by South Korean singer and actor Cha Eun-woo of the boy band Astro.

It was released on February 15, 2024, by Fantagio.

The EP contains six tracks, including the lead single "Stay".

[1][2][3][4][5][6][7] The EP sold 217,295 copies in South Korea and 4,450 in Japan in its first week.

It peaked at number 2 on the Circle Album Chart and number 15 on the Japanese Oricon Albums Chart.