Also known as: 無力聖女と無能王女, 无用圣女与无能王女, 無力聖女と無能王女~魔力ゼロで召喚された聖女の異世界救国記~
Yuri manga by Tamasaki Tama.
Full title: 無力聖女と無能王女～魔力ゼロで召喚された聖女の異世界救国記～ (Muryoku Seijo to Munou Oujo ~Maryoku Zero de Shoukansareta Seijo no Isekai Kyuukokuki~)
English title: The Helpless Saint and the Powerless Princess: The Story of How a Saint with No Magic Was Summoned to Save Another World