Dragon Ball Super (2017), S05E089: An Unknown Beauty Appears! The Tenshin-ryu Dojo's Mystery?!
Goku heads to Master Roshi's island, where Oolong informs him that Tien and Chiaotzu have started a martial arts dojo. Roshi has headed there to act as a special instructor. At Tien's dojo, a woman named Yurin with a grudge against Tien arrives and requests to join the dojo. Roshi drags her off to ogle her. Goku arrives and asks Tien to join the Tournament of Power, but he is reluctant. Yurin escapes Roshi's advances and uses witchcraft to drive Tien's students on a rampage throughout town. Goku, Tien, Chiaotzu, and Roshi arrive at the village, where Yurin confronts them. Yurin explains that she is a former classmate of Tien's during his time at the Crane School and that she swore revenge on him after he left the school and refused to fight her. Meanwhile, Cabba sways Caulifla into joining Universe 6's team by promising to teach her how to become a Super Saiyan. Back on Earth, while Goku, Chiaotzu, and Tien cure the students of their brainwashing, Roshi battles Yurin. He lowers his guard after catching a glimpse of Yurin's panties, which allows her to brainwash him. The brainwashed Roshi quickly defeats Tien, but Goku intervenes. While Chiaotzu temporarily disables Yurin, Goku subdues Roshi with a Kamehameha wave and cures him of the brainwashing. Tien orders Yurin to apologize to everyone she hurt and offers her a place at his dojo. Tien decides to join the Tournament of Power in order to raise enough money to repair the village. Master Roshi quickly agrees to join as well.