In 挑戦 者 の 護 石, burlesque dancer Ruby performs a private show in a velvet-draped room. Feather boa trailing, she teases with each removed glove and stocking. 挑戦 者 の 護 石 captures the moment the audience of one can no longer watch passively—he joins her on stage, hands replacing pasties. Mirrors reflect infinite Rubys writhing in 挑戦 者 の 護 石, her back arched over the chaise lounge. The performance ends not with a bow but with shared breathless applause in 挑戦 者 の 護 石.