Konosuba Light Novel, Vol. 10

The war against the Demon King has put the kingdom in a financial bind. In order to get some monetary assistance from the neighboring kingdom, Princess Iris has been engaged to their prince! But Kazuma's not about to take that lying down. Volunteering to be Iris's escort as she travels to meet her betrothed, Kazuma prepares mentally and physically to confront the ones who would dare snatch away his adorable little sister!