Yuichi Karasuma

When the Punisher takes out a black-market weapons dealer, he stumbles upon a far-reaching terrorist plot devised by a group known as Leviathan.

Rai wakes up from 820-years long sleep and starts his new life as a student in a high school founded by his loyal servant, Frankenstein. But his peaceful days with other human students are soon interrupted by mysterious attackers known as the "Unions".