Far away, in a system so distant that the light from its stars will never reach Earth… A war was drawing to a close. Exelica and Crueltear - humanoid weapons system called Triggerhearts developed by C.H.I.L.D.A., an interplanetary defense organization - were sent to join the fight against the autonomous combat unit known as the Ver'mith. In the midst of the battle, just as they had taken the upper hand over the Ver'mith, Exelica and Crueltear were accidentally sent to Earth using an emergency teleportation gate activated by the Ver'mith.