自粛期間が明け、久々に出社したモモ（伊藤沙莉）は、給湯室でマウント女子（青山めぐ）たちが自粛期間の過ごし方でマウントを取り合う現場を目撃。さっそくウメ（江口のりこ）に「うちの会社では、マウントの取り合いが正式な競技スポーツに認定されたんですよ」と言いながら、さっき見たばかりの試合を報告する。ウメもうっかり乗せられ、２人はツッコミ合戦で盛り上がり…！
Momo (Sari Ito) arrives at work after a long time since the self-restraint period ended, and witnesses the Mount Girls (Megu Aoyama) in the water supply room fighting over how to spend the self-restraint period. She immediately tells Ume (Noriko Eguchi) that "in our company, fighting over mounts has been recognised as an official competitive sport", and reports the match she has just seen. Ume is inadvertently taken in, and the two get into a lively tsukkomi match..!
