Hero: "I came by dragon." Heroine: "Don't say it like I came by bicycle!"

Arisa, a Japanese person who was reborn as the daughter of a marquis through transmigration to another world. Using knowledge from her previous life, she dramatically improved the nation's sanitary conditions, and through this great achievement, she became the fiancée of the crown prince. After that, she continues to work on domestic affairs such as the abolition of slavery, but one day, by saving a slave man, her fate changes drastically. ※This is a participating work in the "7th Shimono Hiro / Takumi Yuiko's Syosetsuka ni Naro Radio Award." The theme is "bicycle." Despite the silly title, it's quite a serious story.