This single in terms of the B-sides is a progression of Iiwake Maybe's, and I believe every non-Kenkyuusei member of AKB48 sings somewhere on this single.
Team A: Kojima Haruna, Shinoda Mariko, Takahashi Minami, Maead Atsuko.
Team K: Akimoto Sayaka, Itano Tomomi, Oshima Yuko, Ono Erena, Minegishi Minami, Miyazawa Sae
Team B: Kasai Tomomi, Kashiwagi Yuki, Kitahara Rie, Miyazaki Miho, Watanabe Mayu
Team S: Matsui Jurina.
You might have noticed a few differences in the teams people are in, I believe that it's here that the divide between the old and new teams occured, which I suspect was a plan by Akimoto to improve one of the teams popularities.
I like RIVER quite a bit. Whether its the fact it changes style about 5 times, or the AAAAKKKKKKBBBBBBB, 48 at the beginning, I can't say. The song is about moving forward, motivating yourself to carry on through the river of fate. The MV starts with them dancing in a military hangars, and I quite like this singles constumes, some of them have trilby's. The story is about the girls as some military unit both preparing at the base and wading through a river to reach their goal.
Team A: Oota Aika, Katayama Haruka, Kuramochi Asuka, Sashihara Rino, Takajo Aki, Maeda Ami, Nakagawa Haruka
Team K: Kikuchi Ayaka, Fujie Reina, Nito Moeno,
Team B: Oku Manami, Ishida Haruka, Sato Amina, Sato Sumire, Komori Mika,
Team S: Matsui Rena,
Kimi no Koto no Suki dakara is about being in love, and all the things you'll do for them just because of that. The MV has them dancing in a field, and story segments have them cleaning a drained swimming pool while messing around a little as well. It starts raining, which leads most of the girls to have even more fun, but one of them walks off.
Team A: Iwasa Masaki, Oya Shizuka, Matsubara Natsumi, Nakato Chisato,
Team K: Uchida Mayumi, Uneda Ayaka, Tanabe Miku, Matsui Sakiko, Makatsuka Tomomi, Nakaya Sayaka, Nonako Misato, Yonezawa Rumi
Team B: Kobatashi Kana, Sato Natsuki, Suzuki Mariya, Chikano Rina, Hirajima Natsumi, Masuda Yuka.
Hokouki Gumo is conversely about loving snd how you once thought you had it all, and compares loves lasting to jet trails.The MV is pretty simple, it's nothing more than a stage performance, but it's still nice to watch.