The single features three tracks, including a Japanese original song as well as Japanese versions of 'CRAZY' and 'EASY'. Contents include digital code card with video content featuring the 'CRAZY' jacket shoot sketch, 'CRAZY - Japanese ver. -' performance video shoot sketch and 'Star Signs' live clip shoot sketch, as well as a 16-page lyric book, selfie photo card (1 of 5 types / random) and portrait sticker (1 of 5 types / random).

Disc 1
1. CRAZY - Japenese Ver. - - LE SSERAFIM
2. EASY - Japanese Ver. - - LE SSERAFIM
3. Star Signs - LE SSERAFIM