Tracks
| # | Title | Sung by | |
|---|---|---|---|
| 1 | STYX HELIX | Mayu | 4:51 |
| 2 | STRAIGHT BET | 前島麻由 | 4:11 |
| 3 | STYX HELIX (instrumental) | MYTH & ROID | 4:50 |
| 4 | STRAIGHT BET (instrumental) | MYTH & ROID | 4:09 |
Source: MusicBrainz release group 146f5470-c5b3-44f3-843e-05da3ae4c53e (CC0). Cover: Cover Art Archive.