There are 3 endings
SPOILERS BELOW
Ending 1.
Answering 2 out of the 3 choices positively will give you ending 1, where you are taken back to earth; and left for the 8 years.
Ending 2.
Ending 2 is where you die from Cato. Bad ending for sure.
Ending 3.
Answering 2 out of the 3 choices Negatively will give you the other ending, which Khemia (the sequel coming 31st) is rumoured to be continuing from. It doesn't really make much difference, other than talking to a dark spirit. but its worth the read :) Sadly, you are still taken to earth though.