When a brother takes the place of his younger sister, he becomes a "Blessed Maiden," charged with dispensing magic... with his body?! An otherworldly story of the relationship between an arrogant sorcerer and his "Blessed Maiden" (♂). 妹の代わりに召喚された兄の仕事は…聖女としてカラダで魔力供給すること!?尊大魔術師×純朴聖女（♂）の異世界BL開幕！妹思いの平凡な青年・梅彦は、とあるきっかけから妹と一緒に異世界召喚されてしまう。