In the Martial Realm hit by beasts, only those awakened warriors can survive. Weapon Spirits are humanity's ultimate power. But they can only reach their full potential when contracted to a partner. Jasper, an F-Rank loser dumped by his S-Rank ex-girlfriend, has unlocked the God-Tier Evolution System. Now he commands strong and talented ladies of every race. The young man they cast aside now controls the apocalypse!