The angel lord, Riel, has descended to the surface. Her purpose? To deal with Pekora and the others and to cleanse the earth!? In the midst of this, Yurine accidentally unleashes a powerful punch on Riel (thanks to 100% the evil god-chan). What will Riel do in response to Yurine's apology...? The production of the TV anime's second season is underway, and here comes the unexpected 13th volume!