Mystery Night! / Eighteen Emotion ミステリーナイト！／エイティーン エモーション
Released April 30, 2014 Editions 7 Tracks 2
Regular edition · Regular A
| 1 | Mystery Night! | A-side |
| 2 | Eighteen Emotion | A-side |
| 3 | Mystery Night! (Instrumental) | |
| 4 | Eighteen Emotion (Instrumental) |
Regular edition · Regular B
| 1 | Eighteen Emotion | A-side |
| 2 | Mystery Night! | A-side |
| 3 | Eighteen Emotion (Instrumental) | |
| 4 | Mystery Night! (Instrumental) |
Limited edition · Limited A
| 1 | Mystery Night! | A-side |
| 2 | Eighteen Emotion | A-side |
| 3 | Mystery Night! (Instrumental) | |
| 4 | Eighteen Emotion (Instrumental) |
Limited edition · Limited B
| 1 | Eighteen Emotion | A-side |
| 2 | Mystery Night! | A-side |
| 3 | Eighteen Emotion (Instrumental) | |
| 4 | Mystery Night! (Instrumental) |
Limited edition · Limited C
| 1 | Mystery Night! | A-side |
| 2 | Eighteen Emotion | A-side |
| 3 | Mystery Night! (Instrumental) | |
| 4 | Eighteen Emotion (Instrumental) |