I recently reread volume 3.. the translated parts. I guess its fair to say that the attitudes of the characters and the events follow the book pretty closely. Might still be way too early before any of the girls see Ryuji as a romantic option. I must admit that I had originally thought that anime is changing the scenes from the novels...but thats because:
And no Roan, no idea how volume 3 ends. but lets hope the anime follows it to a tee. If they just follow the volumes, I be estatic.