Yeah, I guess we can project our happy endings on to it. I dunno if Perfect Girl really wants Closet Sadist Girl as much as she thinks she does, though.
I don't think it's really projecting our own happy endings; unless the title is horribly mistranslated, I'm pretty sure it's to be taken as the answer to the girl's question at the end and I don't really see any reason why Ms. Perfect wouldn't love her considering she was happy to the point of tears about the whole thing.