Stop the presses! As reported by otaku_blue and Amped:
yeah all the ships are sitting next to each other hahaha
Mizuki x Takechan
Akari x Tomoko
Haruna x Dawa
Takagi x Haruka
Risako x Kanon
Mai x Chisato + plus (their child) Masaki
Not just sitting next to each other, but holding hands on the way in (with the exception of Haruna and Dawa who are obviously too cool for this). Akari also sits on Tomoko's lap.
Besides the above there is also Meimi x Zukki, Karin x Rina, MiyaSaki, Kanana x Sakura, Yulina x Chinami, plus the hilarity of absolutely zero people wanting to sit next to Momoko or Erina. Meimi also gets burned slightly when Haruka wants to sit alone with Takagi instead of being part of a four way group with her and Zukki. Maa-chan deliberately disses Erina by scooting away from her but Sakura starts to but then reconsiders, not wanting to hurt the feelings of Momoko.
Not going to lie, I think I watched the first minute of this video a dozen times so far.