released on April 22, 2015.
![12byou (Type A) [CD+DVD]](https://www.j-enta.com/fotos/4683.jpg "12byou (Type A) [CD+DVD]") | 12byou (Type A) [CD+DVD]
Catalog: UMCK-5561 | | 1. | 12byou (12秒) | 3:46 | | 2. | AKB48 - Rock da yo, jinsei wa... (ロックだよ、人生は…) | 4:04 | | 3. | Hohoemi Popcorn (微笑みポップコーン) | 3:30 | | 4. | 12byou (Instrumental) (12秒 (Instrumental)) | 3:46 | | 5. | AKB48 - Rock da yo, jinsei wa... (Instrumental) (ロックだよ、人生は… (Instrumental)) | 4:04 | | 6. | Hohoemi Popcorn (Instrumental) (微笑みポップコーン (Instrumental)) | 3:30 |
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![12byou (Type B) [CD+DVD]](https://www.j-enta.com/fotos/4682.jpg "12byou (Type B) [CD+DVD]") | 12byou (Type B) [CD+DVD]
Catalog: UMCK-5562 | | 1. | 12byou (12秒) | 3:46 | | 2. | AKB48 - Rock da yo, jinsei wa... (ロックだよ、人生は…) | 4:04 | | 3. | Cameleon Joshikousei (カメレオン女子高生) | 3:22 | | 4. | 12byou (Instrumental) (12秒 (Instrumental)) | 3:46 | | 5. | AKB48 - Rock da yo, jinsei wa... (Instrumental) (ロックだよ、人生は… (Instrumental)) | 4:04 | | 6. | Cameleon Joshikousei (Instrumental) (カメレオン女子高生 (Instrumental)) | 3:22 |
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![12byou (Type C) [CD+DVD]](https://www.j-enta.com/fotos/4684.jpg "12byou (Type C) [CD+DVD]") | 12byou (Type C) [CD+DVD]
Catalog: UMCK-5563 | | 1. | 12byou (12秒) | 3:46 | | 2. | AKB48 - Rock da yo, jinsei wa... (ロックだよ、人生は…) | 4:04 | | 3. | Hawaii-e ikou (ハワイへ行こう) | 4:32 | | 4. | 12byou (Instrumental) (12秒 (Instrumental)) | 3:46 | | 5. | AKB48 - Rock da yo, jinsei wa... (Instrumental) (ロックだよ、人生は… (Instrumental)) | 4:04 | | 6. | Hawaii-e ikou (Instrumental) (ハワイへ行こう (Instrumental)) | 4:32 |
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