Hikikomori na Yo wo Douyatte Maou ni Suru to Iunoja?

is a Japanese light novel series written by Yuma Hiiragi, with illustrations by Sino. The series began publication on March 9, 2019 by ASCII Media Works under their Dengeki Bunko publishing imprint.

Synopsis
When I opened the email, I was wrapped in light and summoned to the Demon Castle (solid development). According to the vassal who summoned me, the next Demon King was extremely ill and could not hold the inauguration.

The next Demon King in question is,

"No, I don't like it! I'll die when I get out of the room!" It seems that he is also suffering from hikikomori. If you don't complete your inauguration before the non-aggression pact expires, you'll end up in the worst scenario of a war with humanity !? However.

...... Wait, why am I crazy about Wanabi !? Don't call me "The Jet Black Evil Eye Angel (PN)"!