Onimotsu to Yobareta Tensei Hime wa, Shoukan Yuusha ni Koi wo Shite Seijo ni Narimashita

Reya is reborn as a princess with no magical powers, in a kingdom ruled by magic. However, she is discovered to have the power of purification, and as a saint, she is assigned to save the world with Kazuya, the summoned hero whom she fell in love at first sight! The two people from another world meeting for the first time should have been an emotional event! But Kazuya acts somewhat coldly towards Reya......? (Source: Kadokawa, translated)