After accepting an unexpected job from Water Master Ushio, Gero and Kinosaki find themselves in the midst of the ancient and powerful fire masters! Ushio has been summoned for a sacrificial fight to the death, but when Ushio's opponent is suddenly found dead before the match, Gero must help Ushio break free of the fire masters' backward traditions once and for all!

Volume 11 of the Marriage Toxin manga series by Joumyaku.