Just finished volume 5.... I keep repeating how much I love the artwork. Some of the frame transitions were a bit rough this time but the story of Elda's "coming out to play" and Ren's backstory did a marvelous job of mixing the comedy with the pathos.
I'm delighted that the characters are acting and reacting with more adult frankness than the tamed down anime implied. Loved the anime, but this I'm finding even better.
The author's notes are pretty entertaining in their own way though the author seems to have a terrible self-image