About “Jormungand”
Jormungand is a Japanese manga series written and illustrated by Keitaro Takahashi. It was serialized in Shogakukan's seinen manga magazine Monthly Sunday Gene-X from April 2006 to January 2012, with its chapters collected in eleven tankōbon volumes. (Summary adapted from Wikipedia, CC BY-SA 4.0.)
Some summaries adapted from Wikipedia, CC BY-SA 4.0.