キリトリセン (Kiritorisen)

Background
This song was uploaded on February 26th, 2011 (December 2nd, 2011 on 40m-P's YouTube account), and has reached over 1,000,000 views. A song of a girl (Gumi) "Cutting Off" all of the things and memories that pain her, even the person she loves.

it is featured in the EXIT TUNES compilation album GUMitive.