Okay, you know what? I was planning to start writing the next chapter... then I read Chosen-One-92's review...
Screw that chapter! I'm writing this story all over again!
I will be honest, I did rush this story too fast. If you have noticed, after the first five chapters, the quality of the story went downhill. Points of view were screwed up, time jumps caused too many confusions even to me when I re-read my own story. And I have underestimated the complication of the GATE original story. Also my start as the THIRD attack from Sedaran was a REALLY BAD move.
SO! Even though the critical events are still the same (somewhat), I will rewrite it so the story could be easier for you guys to understand. And I will spoil it right from the beginning: The category for the story is still the same as X-Over & Gate crossover, the three Core worlds will be Earth, Falmart and Hyperdimension's Gamindustri from Neptunia series. Any further crossover materials will be added during the story.
Thank you, Chosen-One-92, for writing that out that makes me realize my mistakes.