Peace has returned to the Korai House apartment building after Yuuta Iridatsu and his fellow tenants saved the world. Then a new epidemic starts making young women flash their underwear in the street, and Yuuta still passes out the instant he sees any. Mikatan Narugino and the rest of the residents take the case, and when their friends fall into enemy hands, Yuuta and Mikatan head for a final showdown. This manga carries the story past the last episode of the Punch Line anime.