Okay I won't lie.

I was watching Aphmau MMDs when this popped into my head...

Haikyuu AU where they were idols. I know exactly how this'll play out.

Idea 1) The Haikyuu characters are idols who attend idol school. There they were demanded to form groups and create names. Karasuno, AobaJosai, Nekoma, Date Tech, Fukurodani, FARMERS I mean Shiratorizawa, Johzenji, Tokonami, Wakutani, Ougiminami, Kakugawa, Ubugawa, Shinzen, Nohebi, Itachiyama, and Neighborhood Association were the teams.

Idea 2) They go to their schools and are in the male idol club there. (Imagine Tuskki and Ushijima being idols XD) 

Idea 3) they don't go to school and are like all 17-20 and are popular idols. There will only be seven because I'm lazy and don't wanna haft to make more. Groups:

group 1) Hinata, Yamaguchi, Kenma, Nishinoya, and Suga (the main cinnamon roll squad) and Yachi as manager.

group 7) Yahaba, Ennoshita, Yaku, and Goshiki. (the side cinnamon squad) with Shibayama as their manager.

group 2) Daichi, Kuroo, Akaashi, Oikawa, and Iwaizumi (OH GOD IT'S THE SEXY SQUAD) and Kiyoko as manager.

group 3) Kageyama, Tuskki, Bokuto, and Kyoutani. (squad tsundere) and Ukai as the manager

group 4) Lev, Asahi, Kanji, Aone, and Ushijima. (tall fucker squad) with Takeda as their manager... poor Takeda.

group 5) Narita, Kinoshita, Tanaka, Yamamoto,  and Tendo. (leftover squad... I'd be in this one) with Nekomata as manager.

group 6) Matsukawa, Hanamaki, Watari, and Terushima. (random squad) with Kunimi as manager.

or it could be mom group, dad group, cinnamon kid group, tsundere kid group, and left over children group.

I'm surprised this was written. You may start judging my imagination now.