Sekaiju no Shita kara Hajimeru: Hanryuu Shoujo to Boku no Musou Life世界樹の下から始める半竜少女と僕の無双ライフ; Starting From Under the World Tree: The Dragon Girl and My Invincible Life

Buried by an avalanche caused by an eruption, a girl discovers a secret place undergroud where she tastes the flesh of a dragon, becoming half-dragon half-human. Afterwards the girl who was to be sold as a s*ave was bought by a kind-hearted boy. This novel is about a girl who became a Half-Dragon and a boy who has healing magic; a story about their carefree journey.