What the Evil Dragon Lives For

Elaine becomes a human sacrifice to the evil dragon Rabess, who is here to destroy the empire. But it seems that Rabess already knows her. And he offers to grant her three wishes...
Elaine feels she should at least save the world, so she asks him not to destroy it. Then she ends up returning 10 years in the past, to when she was 16 years old.
However, Rabess seems to have a different plan in mind...