The 111th Suggestion: Playing Around Is the Right Idea (ふざけられたらいいんだけどね, Fuzakeraretara Iindakedo ne) is the one hundred and eleventh chapter of the series Medaka Box.
Summary[]
Megusuno's challenge of Probatio diabolica continues. How can the Student Council defeat a Cerberus that doesn't exist, when neither Wanizuka's guns, Kikaijima's lungs, nor Kumagawa's Minus have any effect? Well, they need not fear; Magical Girl Tsugihagista SS Ruby-Sapphire the Fifth (you might know her as Magical Wonder Tsugiha from the neighborhood) is here!