/jp/ - Otaku Culture

Can someone spoil the true ending in detail? Finished all others and I'm a bit tired to go through all of this from the beginning.
Also, nobody really get the meaning of the train scene as I see, where probably, Rokushiki gave an egg which he stole to Shinji, I mean, Shinji was obsessed with his mother search so it should be him that boy who found his mother in that train, but about the one who gives this egg i am not sure, because this story is told even if Rokushiki goes to jail So, can someone shed light to that train scene?
I have another question, about doctor Fumiya. Where did he lost his fingers? Chizuru said something about her fault and wincest, but does she said exactly why Fumiya lost them?