@Nick86 Well it makes sense for the chapters 17 onwards as mangaka skipped a lot and I mean a lot:
Vol. 01:
- The meeting with the king, cure of the princess, Loligon travel to city and future revenge promise.
Vol. 02:
- Alchemist Edita Arc (Basically the whole arc)
- Half of school Dorm Arc has been skipped or changed (Sophia's body fluid feast fetish, it changed Esther killing the bullies for a second assassination attemp (ch. 20), Allen's change name before war, mana potion creation.
Vol. 03:
- War Arc (The whole damn war)
- Witch Arc (Changed how Hardt appears (Ch. 20 p. 21), Ch. 21 and 22 are totally non-canon. The whole arc)