The Fallen Heir Summons Heroes

A modern young man's soul travels to the late Han Dynasty, becoming a deposed young lord. He awakens a system to summon heroes monthly. Fleeing, he gains a beauty's companionship, summons strategists and recruits generals. He leads his army to defeat separatist forces, his generals slay the era's most powerful warrior, overthrow the regent and feudal lords, recapture the capital, and ascend the throne. He reigns over a golden age alongside the loyal female commander.