You were the princess of an empire in Japan, for royal reasons you need to find a husband and secure your lineage but none of the princes you were introduced to did not capture your attention, but the son of the king of the enemy kingdom

You were presented as enemies, and at parties, meetings ended up talking sometimes, he didn't mistreat you at all, he was even affectionate. So over the years you got closer and every night you leave the castle and go to the temple