"Darkness to Darkness" (闇から闇へ Yami kara Yami e?) is the 115th chapter of the Toaru Majutsu no Index manga, released on March 11, 2017.
- Accelerator manifests black wings and kills Kihara Amata.
- Index's voice successfully disables the virus in Last Order's brain.
- Fuse Kazakiri dissipates and Kazakiri Hyouka is returns to normal.
- Acqua of the Back retrieves the defeated Vento of the Front.
- Etzali arrives and recruits Accelerator to work for Academy City's dark side.
- Aleister cuts the direct line of communication between himself and Heaven Canceller.
By order of appearance:
- Index Librorum Prohibitorum
- Kihara Amata
- Last Order
- Misaka Mikoto
- Kamijou Touma
- Vento of the Front
- Acqua of the Back
- Kazakiri Hyouka
- Unabara Mitsuki
- Aleister Crowley
- Heaven Canceller
- The chapters differs slightly from the light novels and anime when the imposter Unabara Mitsuki appears to recruit Accelerator to the dark side rather than the GROUP liaison.