Idk if they are gonna continue this grudge game for the rest of the manga but, I'm starting to hate them about how they (Saki and Dragon) keep spouting nonsense about how MC forgot them and how they both treat him in a bad manner. FFS they all were children at that time. Lol and are bound forget things. By looks of it, I think only the MC grew and matured and the rest were just as if the time stopped for them (mentally).
As it already been hinted, but I think Saki got some issues with her memory.