Two Demons

Two Demons is the eighty-third chapter of the Seraph of the End: Vampire Reign manga series, written by Takaya Kagami and illustrated by Yamato Yamamoto.

Short Summary
Taking the final step, Guren finally completes his demon transformation. Unfeelingly restraining his friends, Shinya demands Byakkomaru give him more power to which they then have an argument over Shinya's sanity. In the end, Shinya wins and Byakkomaru agrees to help him, turning Shinya into a demon himself. Shinya fights Guren although to no avail as Guren proved far stronger. Guren injures Shinya who then sees Mahiru-no-Yo and Noya. Right after, Guren unleashes chains to borrow some power from his friends before boldly declaring his intention to save the world.

Alone.