Humanity has been driving away the Demon Lord's army for a long time by summoning "Heroes" once every 100 years. But one day, the Demon Lord's army devises a countermeasure to the Heroes: entrap and kill them when they're in a defenseless state straight after the summoning. To commemorate this historic fear, the Great Demon Lord designated that year as "Year One of Entrapment Killing." The Heroes have all been slaughtered by the Demon Lord's forces ever since. Fast forward to today, Year 1000 of Entrapment Killing: the summoners are very worried. "What kind of Hero should we call? I don't know... Someone take this out of our hands!" And thus, they summoned Hiroyuki, creator of 2channel and the master at settling debates.