I just realized that every major character in every volume will be in the summer trip except for Sara and Nina.
Maybe the Kyoto girls will somehow show up? I don't think it's likely, but it'd be super exciting to see everyone back.
Though at this point, I'd like to see Yuzu and Mei on a nice one-on-one date or something. Communication and more blushes are making a strong comeback in this series and it's been a long time coming.
Drama CD related:
Just watched the drama CDs on Youtuber Omni Essence's channel. Yuzu is damn lucky to have Harumin as a friend! That girl would be a grade A wingwoman.