Riviere and the Land of Prayer, Vol. 3 (light novel) — Jougi Shiraishi

Riviere, myself, and Elaina are hot on the trail of Antiques Carredura, the shop that recklessly sells dangerous sancta. The owner is always one step ahead of us and keeps slipping through our fingers! But this time, there's something different about Riviere. Thanks to meticulous strategizing, carefully selected sancta, and me, her trump card, Riviere's old enemy has been backed into a corner! The sorrowful past that connects Riviere and Carredura is revealed at last!