Taboo Tattoo (GN 2)

Seigi, once an ordinary middle schooler, has been tattooed on the palm of his hand with a super-ancient weapon called a spell crest--and because of it, he's been caught in the middle of a war between America and the kingdom of Selinstan! Seigi is enlisted by an American military girl named Easy in order to help recover more spell crests, and a new crisis arises when Easy's colleague, Lisa, is attacked by the kingdom and kidnapped. What will happen to Seigi and Easy in the face of a dangerous enemy?!