Leftover Prince is a Manga/Manhwa/Manhua in (English/Raw) language, ONESHOT
series, english chapters have been translated and you can read them here. You are reading Leftover Prince chapters on https://mangabtt.com, fastest updating comic site. The Summary is
A cook that's also a hero and a swordsman are going to an adventure. They have to slay the dragon that's terrorize the village and wants to devour the mayor's grandchild. Will they be able to slay the dragon and save the village?