meth-e-meth

Sinopsis

In a world where humanity utilizes powerful weapons called Autoscrolls and the Oath-Making technology to control them, these devices have become integrated into daily life in modern-day Japan. Oath-Making has evolved into a systematized science. Kyouta Yuzuki, a high school student and passionate member of the Oath Club, experiences a transformative event after an accident involving a mysterious scroll. This incident leads to the transplantation of an Oath-Heart, fundamentally altering him into a new kind of being.