The book itself is decent enough, but don't bother getting too invested into it. The 2nd volume came out almost 2 years after this one, and the author has no online presence whatsoever, and their psuedonym is so absolutely generic that they're impossible to look up, so good luck finding any news about new or upcoming volumes and stories. Everything is handled via the publisher, who similarly doesn't post any in-progress updates, and whose website looks like it was made in the late 90s/early 2000s and hasn't been updated ever since. The artist's work is also incredibly inconsistent, both within and between volumes, but some of it is pretty fapworthy.
The 2nd volume is the typical "boy is uncomfortable with getting used to being a girl" setup these longform stories always seem to have, and is almost purely fap bait, with some hypnosis/mind control elements, and answers nothing about the mystery behind what's going on, which is good if you just wanna read porn, but terrible if you're one of the rare people actually invested in the plot. They were also incredibly lazy and didn't bother making a new cover for the second volume; instead, they just used a collage of illustrations from the first volume, and slapped that on the "cover".
5.5/10; decent if you've got nothing better to read, or like jerking off to text like some non-hentai degenerate, but absolutely not worth paying full price for.