The stated (in-world) point is the same as for events like idol sports days and such: to give fans a glimpse of their favorite idols doing "normal" things like participating in school events. (And I think they want that so the fans are less likely to stalk/crash their actual school events.)
Eh... Is that so?There is no way that would be true!
...I mean, to start with cleaning as the first part of our photo-shoot...
I cannot help but question how we are going to do thisFuhi...! Really nice...Clean-ing the pool is... the best ...βThis sliminess on the floor akin to nameko ...
Now that's... more like it...!Morning, Syoko! You're sure here early-!I just assumed... that everyone would be helping with the photoshoot and... the forever alone me was called to clean the pool...