bump.y is a girl idol group, founded in 2009 by Sweet Power (スウィートパワー).
The concept of the group is to bring six actresses together as an idol group; the group's name is an acronym and each member's attributed characteristic is supposed to correspond to each component of the acronym: Brilliant, Universal, Miracle, Power, the period is intended to represent "moving freely", and finally Youthful. The group "graduated" in end of June 2014.