収録内容

1. Giant Step / Astronauts (Vocal: May'n&椎名慶治)

2. ENDLESS PLAY / Astronauts feat. SHIINA (Vocal: 椎名慶治)

3. Giant Step Rock'n Roll States edit. / Astronauts (Vocal: May'n&椎名慶治)

4. Giant Step (instrumental)

5. ENDLESS PLAY (instrumental)

6. Giant Step Rock'n Roll States edit. (instrumental)