Love Live! Nijigasaki High School Idol Club FLOWER MUSIC LIVE 'Boooooom Boooooom Bee!!' (ラブライブ！虹ヶ咲学園スクールアイドル同好会 FLOWER MUSIC LIVE「Boooooom Boooooom Bee!!」) is Nijigasaki High School Idol Club's solo live concert that too…