Does anyone know which series these are from?
It has lot's of meganekko... DO WANT!
Oh I see now... they're from Kujibiki Unbalance, te actual show, not the original OVA included in Genshiken.
They look like their from the second season of Kujibiki Unbalanced within the OVA of Genshiken. I can tell by the second pic where the chick with the helmet is in a suit, that poster was seen in ep 13(1) of the OVA.