This novel has been adapted into a book series, with two volumes published by Kadokawa BOOKS since April 10th. Luka, a 6-year-old boy in a dungeon city, wakes up from a high fever with the memories of a 30-year-old salaryman, 'Kawabata Yukiji.' With a cute sister Sophie, a beautiful mother, and a kind father, this world isn't so bad after all... However, the family inn is barely surviving on cheap prices alone! I can't let this go on! I will definitely turn it around! With a child's body and a 30-year-old's mind, this is a heartwarming story of a boy's struggle to run an inn in a different world. Also published on Kakuyomu.