The Hinowa Empire is protected by dragons. The Shiryuke family has worshipped dragons since ancient times, and to pray for unchanging protection, it is customary to offer the daughter of the head of the family as a "flower bride" once every 100 years.
Although it is called "hanayome," the kanji used for it is "hana-yome." In other words, it is a sacrifice.
Chiyo, who was taken in by the Shiryuke family and has been oppressed, thought that she could escape this painful life by being eaten by the dragon as a flower sacrifice, but the dragon embraced Chiyo and said, "I will treasure you"...
A sacrificial girl blossoms as she is loved by a god - a Japanese-style romance fantasy.