Gleipnir

Shûichi Kagaya is a young boy who possesses the troublesome power to transform into a mascot. One day, he meets a mysterious girl, Claire, who seems to be drawn to his power. Since then, Shûichi's daily life has been punctuated by strange incidents… Until the day he is attacked by a monster possessing the same transformation power! Involved against their will in a confrontation between monsters, the two high school students unite as one to take control of their destiny!