トップレスよりボトムレス！下半身丸出し開放ステージ！Bottomless is more erotic than Topless! Open singing stage with the entire lower half of the body exposed!
水着の下だけ脱がして歌わせてみた。ボトムレスって超エロくない？
I made my idols sing with only their bottoms off of their bikinis. Isn't bottomless super erotic?