From the back of the book:
The year is SC 0245.
Humanity has spread through the Milky way, using interstellar transit gate technology to colonize the galaxy. Mobile frames are the hard-working, hard-fighting combat- and labor mecha they've brought with them.
You are romantic ace mobile frame pilots, caught up in an undeclared war for the future of the Bantral system.
Fight with your friends. Ally with your rivals. Fall in love with your enemies.