Idol group Shiritsu Ebisu Chugaku (私立恵比寿中学) is getting ready to release single Butterfly Effect with tie-up as the opening theme for anime Nanana’s Buried Treasure (龍ヶ嬢七々々の埋蔵金). Ebichu’s 6th single comes on three editions scheduled for release on June 4th 2014 - read on for more details.Shiritsu Ebisu Chugaku (Ebisu...