巡る世界のレクイエム (Meguru Sekai no Requiem)

Background
"Meguru Sekai no Requiem" was first uploaded on December 19th 2012 as the third and final song of the Synchronicity Series. At the same day, the album "EndlessroLL" was also released, with Meguru Sekai no Requiem as one of the tracks in Yamashizuku's first major debut album.

Suzunosuke have released several works in relation to Synchronicity. Several of which are Colorful 2 (with one of it's story uploaded to Suzunosuke's Pixiv account one day after the song Meguru Sekai no Requiem was uploaded to Nico Nico Douga; also the full color book "Synchronicity ~Kioku no naka no komori uta~" to be released on December 31st 2012, Comiket 83.

The song ends the three years cliff hanger of the series, with Rin and Len finally reunited. Their wishes completely opposite to each other, they faced their fate. All in all the ending and conclusion of the series may differ to watcher's interpretation.