Episode 3:
I have 1 problem with the show: it is very difficult to differentiate between children here, if they have somewhat similar hair length and age. Haruki looked very similar to Maru in some shots.
Also, I am pretty sure, I heard a gunshot, so the sister was probably shot by the doc. Why - no idea. But I doubt it's because she wanted to save her brother.
Also, now that I think about it, Maru's "twin" at school looks more like a girl to me.
