I'm leaning towards "true"... well, unless it turns out that this new girl is an extremely good actress who somehow can shed real tears practically at will. But even then, the whole place looked deserted, and I don't think she had any reason to notice Ms. Got-Molseted-by-Oginouchihara nearby.
Plus, would such a twist be really Mochi's style?
Ahhh...What do I do...This is Hotaru Island, on Meiten...You'd need a bus or a boat to go home.Where is your home?In Osaka...That's too far...But it's not like you can find any left at this hour...How about coming with me?