When you see Sonico in the portrait of a Nitroplus Art book you sort of establish some level of expectations. however, this one art book provided me an surpassed my expectations. this art book ain't just simple pictures, but features all of the Nitroplus loved characters we've seen in the last few years in many of the several animes we enjoyed watching.
You like nitroplus, then you gotta see what they can deliver in this artbook.