ISOtone

 is the fourth single by Kon Natsumi. It was released on August 5, 2015, and peaked at #76 on the Oricon single chart.

Single Information
The lead track ISOtone was used as the opening theme for the anime Chaos Dragon: Sekiryu Sen'eki.
 * Catalog Number:
 * THCS-60059 (Regular Edition)
 * THCS-60057 (Regular Edition)
 * THCS-60058 (Regular Edition)
 * Lyrics: R・O・N (Track 1)
 * Composition: R・O・N (Track 1)
 * Arrangement: R・O・N (Track 1)

CD

 * 1) ISOtone
 * 2) Sleep without a memory
 * 3) Despair Syndrome
 * 4) ISOtone (Instrumental)
 * 5) Sleep without a memory (Instrumental)
 * 6) Despair Syndrome (Instrumental)

Limited Anime Edition DVD

 * 1) Non-credit Opening
 * 2) ISOtone
 * 3) Sleep without a memory
 * 4) Despair Syndrome

Limited Artist Edition DVD

 * 1) ISOtone (Music Video)
 * 2) ISOtone
 * 3) Sleep without a memory
 * 4) Despair Syndrome