Sleep

==Background==
"sleep" is otetsu's tenth album which consists of 7 original tracks. The album features the vocals of GUMI, Megurine Luka, and IA. It was first distributed at THE VOC@LOID M@STER 27 and was later re-released by KARENT.
==Preceding album==
Seed album.jpg|Seed
==Track listing==
==External links==
===Official===
===Unofficial===
Category:Albums
Category:Japanese albums
Category:Albums featuring GUMI
Category:Albums featuring Megurine Luka
Category:Albums featuring IA
Category:Albums featuring MAYU