I have bought and finished reading Vol 3. Ahhh !! It was so interesting !! I have never read a school battle fantasy Isekai LN as interesting as this series, particularly this volume. Probably the best volume so far compared to the previous 2 introductory volumes. Now for my brief review below, in spoiler tags :
Spoiler for for review:
So, yes, the changes to the publication version, is that we now have a major central plot that can be explored further in depth later on in the story, ans that central plot concerns that world's "Fallen God" as well as such an evil God might having intentions to kill the Dragon God, whose daughter is now being raised by the MC and the Heroine.
That is revelead in the last major battle scene in this volume, but the first half is also super interesting with a real edge of your seat thrilling first battle scene involving one of MC's male friends, Takuya who bravely protected the princess, Riru of the neighbouring Ristelle Kingdom from certain death from a powerful Dragon's Breath attack from a S-class monster, a Black Dragon, with his Upper Class Defense Magic. I find this battle most interesting and entertaining so far, due to the participation of most of the important characters of this series in fighting that 黒竜
So due to this, Riru is now kind of interested and attracted to him, so after making a pledge to change her behavior to make Takuya more accepting of her, she made a once-in-a-lifetime sacred pledge that can be considered as a serious proposal-kind of meaning, and after all sorts of stuff, by the end of this volume, they become engaged. Birth of second OTP couple in this series! Congrats!!
Now, my number 1 problem, is I can't wait for Volume 4 !! Very interesting and fun to read that I just can't wait to read the next volume.