There isn't a lot of thematic or plot derived meat to this manga. Its mainly built around the visual and dreamlike experience that one has reading it.

In this way it succeeds.
The artwork in here has some of the best use of texturing and patterning that I've seen in a manga.
Pages are as much differentiated by the texture of objects as their spatial separation. Really delightful to look at.
The use of light within the pages is also well done. Highlights and shadows are integrated into the soft and simple artstyle in excellent ways. Greys are used comparatively sparingly to great effect.
The paneling also works very well. With in-page and cross-chapter paneling styles working to make this a very smooth and funny read, excellent timing supplied for the comedy.

As for the writing, fever dream is the best description. Neither us nor the protagonist are really able to follow everything. And its all the better for that.
Characters are erratic and often disturbed, but in largely harmless manners. Its bewildering, but thats what makes it fun.

Really, it's titles like Sayonara Minasan that remind me, at the end of the day, why I love reading manga so damn much. It's just so...unusual and unpredictable, in a good way.

First of all, though, a word of caution: If you like your stories to be logical, starring sensible characters with perfectly rational thought processes, there's nothing for you here. As the short synopsis above can testify, nearly every page in this volume is weirdness itself. It basically follows a slice-of-life format, but it's not the kind of life any one of us is likely to experience. All the seemingly random occurrences do eventually coalesce into a coherent (for lack of a better word!) narrative, making Sayonara Minasan more than just a collection of vignettes.

Kimura is a likeable heroine, which is a rare enough compliment from me. She's calm and sensible, yet has enough flexibility to go along with - and therefore experience - the odd happenings around her while being neither particularly influenced by them nor being compelled to play "tsukkomi" to the crazy guys she gets involved with. She's the best kind of protagonist for a psychedelic story of this nature, because she provides an anchoring point for the reader without being a "clueless audience surrogate."

The art style is a perfect complement to the plot; I don't think I've ever seen anything quite like it before.

Verdict: Recommended for fans of the bizarre and unique; not so much for the average reader.