With the kingdom's Knight Corps weakened, invasion by the empire is imminent, putting Tauro's cushy life on hold. Together with Lightning, the man who won the Altar Tournament, Tauro and his giant mech, Old Lady, must protect the northern borders from the empire's onslaught. Can they save the kingdom and still have time to get their rocks off? Quirky new characters include a viscountess with an insatiable appetite for younger men, a sexual gourmand, and more!