Hi Ryu No Renai (Kadokawa Ruby Bunko)

[Machine Translation] Arce, who has memories of a previous life, thinks that this world resembles the world of children's books he read in a previous life. Then, as in the story, his twin sister is chosen to be sacrificed to a dragon. If the story is true, she will be saved by a brave man, but there is no guarantee of that. After much hesitation, Arce decides to take her sister's place. However, the roar of the dragon knocks him unconscious, and when he wakes up, he is pushed down by a strange young man. Arce, who says that he is a dragon and that you are my mate, is embraced by the stranger without understanding what is going on...? A tale of reincarnation and intermarriage between a dragon and a villager!

前世の記憶があるアルセは、この世界が前世で読んだ児童書の世界に似ていると思っていた。そんな時、物語通りに双子の妹がドラゴンの生贄に選ばれてしまう。物語通りであれば妹は勇者に助けられるが、その保証はない。迷った挙げ句、妹の身代わりとなることを決めたアルセ。しかしドラゴンの咆哮に意識を失い目を覚ますと、見知らぬ青年に押し倒されていた。自分はドラゴンで、お前は俺のツガイだと言う青年に、訳も分からず抱かれてしまったアルセだったが!?竜人と村人が贈る異世界転生&異類婚姻譚!!