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The single was announced on January 14, 2019. The song was first broadcast on January 21 on Tokyo FM's program "SCHOOL OF LOCK!" and the music video was first released on Keyakizaka46's website on February 1, 2019.
Track listing
Type A
All lyrics are written by Yasushi Akimoto
CD
No.
Title
Length
1.
"Kuroi Hitsuji" (黒い羊)
5:07
2.
"Kimi ni Hanashite Okitai Koto" (君に話しておきたいこと)
4:57
3.
"Nobody"
3:48
4.
"Kuroi Hitsuji" (off-vocal)
5:08
5.
"Kimi ni Hanashite Okitai Koto" (off-vocal)
4:57
6.
"Nobody" (off-vocal)
3:47
Blu-ray
No.
Title
Length
1.
"Kuroi Hitsuji music video"
5:37
2.
"Nobody music video"
4:02
3.
"Keyakizaka46 Bonus Video ‘KEYAKI HOUSE’ ~Part.1~"
Type B
All lyrics are written by Yasushi Akimoto
CD
No.
Title
Length
1.
"Kuroi Hitsuji" (黒い羊)
5:07
2.
"Kimi ni Hanashite Okitai Koto" (君に話しておきたいこと)
4:57
3.
"Dakishimete Yaru" (抱きしめてやる)
4:06
4.
"Kuroi Hitsuji" (off-vocal)
5:08
5.
"Kimi ni Hanashite Okitai Koto" (off-vocal)
4:57
6.
"Dakishimete Yaru" (off-vocal)
4:05
Blu-ray
No.
Title
Length
1.
"Kuroi Hitsuji music video"
5:37
2.
"Dakishimete Yaru music video"
3.
"Keyakizaka46 Bonus Video ‘KEYAKI HOUSE’ ~Part.2~"
Type C
All lyrics are written by Yasushi Akimoto
CD
No.
Title
Length
1.
"Kuroi Hitsuji" (黒い羊)
5:07
2.
"Kimi ni Hanashite Okitai Koto" (君に話しておきたいこと)
4:57
3.
"Heel no Taka-sa" (ヒールの高さ)
3:50
4.
"Kuroi Hitsuji" (off-vocal)
5:08
5.
"Kimi ni Hanashite Okitai Koto" (off-vocal)
4:57
6.
"Heel no Taka-sa" (off-vocal)
3:49
Blu-ray
No.
Title
Length
1.
"Kuroi Hitsuji music video"
5:37
2.
"Heel no Taka-sa music video"
4:43
3.
"Keyakizaka46 Bonus Video ‘KEYAKI HOUSE’ ~Part.3~"
Type D
All lyrics are written by Yasushi Akimoto
CD
No.
Title
Length
1.
"Kuroi Hitsuji" (黒い羊)
5:08
2.
"Kimi ni Hanashite Okitai Koto" (君に話しておきたいこと)
4:57
3.
"Gomen ne Christmas" (ごめんね クリスマス)
4:37
4.
"Kuroi Hitsuji" (off-vocal)
5:08
5.
"Kimi ni Hanashite Okitai Koto" (off-vocal)
4:57
6.
"Gomen ne Christmas" (off-vocal)
4:36
Blu-ray
No.
Title
Length
1.
"Kuroi Hitsuji music video"
5:37
2.
"Gomen ne Christmas music video"
3.
"Hiragana Keyakizaka46 Bonus Video “Hiragana Keyaki Chanto”"
"週間 CDシングルランキング 2019年03月11日付" [Weekly CD Single Ranking for March 11, 2019]. Oricon Style (in Japanese). Archived from the original on March 6, 2019. Retrieved March 6, 2019.