Both books cover the rest of the q'ten lo arc, Motoyasu's filorial street race, the Twin pheonix guardian beast fight and a few extras in between. Next post i'll list the major deviations from the WN introduced in these new volumes of this fantasy revenge isekai series.
Major deviations/Inclusions: Vol 14: >Shield strengthening methods revealed >Shildina is introduced(Sadina's sister) >Background about Sadina and raphtalia's parents >Raphtalia's cousin is introduced (Former Q'ten lo Heavenly Emperor) >Info about the "Pacifiers"
Vol 15: >Instead of itsuki being last, motoyasu is the last hero to be recruited >No lesbian rape >No Mad scientist arc >Pre-pheonix events go a bit differently
Easton Gutierrez
>No lesbian rape Aw man. That was the good stuff!
Michael Barnes
>lesbian rape Firo and the princess?
Thomas Gonzalez
Yeah, you'll recall that in the WN fitoria had been controlling firo, sending her into heat until naofumi got control over motoyasu. In the LN, since raph-chan is a thing, she keeps firo out of that state.