is a series of Japanese social network games developed by Happy Elements K.K.

It was first launched as a GREE game in November 2012, and was released for Android and iOS devices in 2013.

was planned to end in November 2017, but this was pushed back to February 2018.

[3][4] Later that year, Happy Elements released an app called Ensemble Girls !!

The player enjoys the new school life, helps the girls to solve problems and crisis, and later finds out the reason why he transferred to Kimisaki.