Okay, suppose we have an Isekai Quartet moment but with school anime a million years from now. Here are the anime who get isekai'd into an elite school:

• Light Music Club (K-On!)
• Service Club (Oregairu)
• Classics Club (Hyouka)
• Outdoor Activities Club (Laid-Back Camp)
• Pastimers Club (Asobi Asobase)
• Host Club (Ouran High School Host Club)
• Art Club (This Art Club Has A Problem, Blue Period)
• Board Game Club (Love is War)
• Occult Club (Jujutsu Kaisen, Asobi Asobase)
• I'll include Nichijou, Daily Lives of High School Boys, and Bocchi the Rock! for good measure.

How would you imagine interactions between characters would be? Personally, I can imagine the Pastimers Club and Board Game Club eventually merging at some point (after all, Olivia likes pastimes, as well as Chika).