Aiyoku no Eustia -Original CharacterSong Series- EUSTIA
| Composed by | Kosuke Saito / Kotaro Odaka |
| Arranged by | Kosuke Saito / Kotaro Odaka / sumiisan |
| Published by | Side Connection Music |
| Catalog number | SCMN-007 |
| Release type | Game Soundtrack - Official Release |
| Format | 1 CD - 5 tracks |
| Release date | November 25, 2011 |
| Genres |
| 1 | 空種－そらたね－ |  | |
| 2 | Asphodelus（アスフォデルス） | | |
| 3 | 空種－そらたね－（Off Vocal） | | |
| 4 | Asphodelus（アスフォデルス） update ver. (Off Vocal) | | |
| 5 | 空種－そらたね－ (Acoustic Arrange) | |
