Reina, the second princess of the Kingdom of Fromecia, who has been oppressed as a child of a concubine since childhood. Due to the defeat of her own country, as a condition of her peace, she will marry into the beastman country instead of her sister. She is fearfully married to Cain, the Dragon King, who is rumored to be the "most fearsome", but there is a handsome man with golden eyes! Reina finished safely. However, on the first night of the newlyweds, she was coldly thrown out by Cain, saying, "This marriage is just superficial." 幼い頃から妾の子として虐げられてきたフロメシア王国第二王女のレイナ。自国の敗戦により和平の条件として、義姉の代わりに獣人の国に嫁ぐことになってしまう。「最恐」と噂の竜王・カインに恐れつつ嫁入りするも、そこには金色の瞳を持つ美男がいて!?カインの気遣いや心優しい獣人たちに祝福され、結婚式を無事に終えたレイナ。しかし迎えた新婚初夜、カインから「この結婚は上辺のものに過ぎない」と冷たく突き放されてしまい――!?