I was kidnapped by the self -proclaimed Demon King. Is it really that the hero gets sick without me? (2 books in all)

Publisher: KADOKAWA/Kadokawa Bookstore
Author: Mayumi's Nanao Yamashita
Size: 105mm x 148mm
Number of books: 2
Language: Japanese
Category: Light novel, manga
Latest publication date: 2017-12-29

Synopsis:
A mage of "Holy", a rarely attribute, who is a childhood friend of Ritz Ritz. Dent in the engagement story of the hero and the princess, treated as a luggage from a friend of the Demon King's defeat ... When it is a self -proclaimed "Demon King", it should be a big pinch!