This CD+DVD package contains the second opening song to the TV anime To Aru Kagaku no Railgun S .

The CD tracks are as follows.

1. Eternal Reality
2. Scorching Heart
3. Eternal Reality (Instrumental)
4. Scorching Heart (Instrumental)

Songs by the group fripSide, singer Nanjou Yoshino (南條愛乃) .

This is the 7th single by fripSide.

The DVD contains the following.

• promo video of "Eternal Reality"
• making of video
• video of "Sister's Noise" from the "LisAni! Circuit Vol.03" concert (2013.03.22 at Shibuya O-East)

There are three different versions of this CD.

• Eternal Reality Anime Version
• Eternal Reality CD+DVD
• Eternal Reality CD only