Gleipnir

Shuichi's normal life ended when he first transformed into a monster, but meeting the dangerous Claire has sent them both down an even darker path. Now that Claire has discovered she can control his freakish costume-like form by climbing inside him, she's certain that her killer instinct and Shuichi's brute strength will make them an unstoppable team--but neither of them are ready for the horrors they're about to face.