>>281425143
>>281425170
I suspect it's going to be bittersweet with at least one—if not more—staying behind either out of choice or necessity. It might even be all of them except Mai, though I predict at least a RinaMai pairing, with her revealed to be showing up on the train that's pulling into the station as she's tearily reading what seems to be a goodbye letter.
The fact that the construction site was clearly unearthing a bowling ball shows that megane-chan's interpretation of time travel in the setting is wrong, and anything they end up doing is something that has already happened.