By twelve noon, those who didn't bother to pack their things in advance started packing right away when Alan announces to the members of the book club that they should be leaving the island by one o'clock since their bus service is arriving at two in the afternoon.
For Sakura and Yuna, they packed their things as soon as they woke up in the morning and are eating lunch now at the seafood restaurant with everyone else at the restaurant who is finished packing.
Sakura would have fully enjoyed her last day on this island if it only weren't for that thread posted by an anonymous netizen from this book club.
According to Alan earlier, whoever did this sort of thing wanted to embarrass both her and Mori Ken. She would probably understand if it is only her who is the mere target of the post, but to think that he or she wanted to humiliate the most popular guy in the school? That is just quite unbelievable.