The emotional tension and unease was horrible and wonderful. Great job by Tomacchan in the confession scene. Powerful cliffhanger: show you the physical event, but leave peoples' reactions to next week. Nasty.
I didn't feel the "hatred" from Irena that Anaru did. Just despair and envy and "why her and not one of them?" Seems highly understandable. The kids didn't have the wherewithal to keep talking with her and explain that they really felt guilty and still loved Menma. Her lines could have been delivered in a more hateful way than they were, or perhaps it was me drawing the wrong conclusion from the seiyuu's tone of voice.
Oura Fuyuka is a good voice actress: recently Otake in
Five Leaves and Kifa in
Legendary Heroes.