S1·E71 Opening! Challenge to the world!

No matter what Endou and the others do, Coach Kudou won't let them out of the building they stay at. But for some reason, he lets Toramaru go home. Tsunami successfully snook out when the coach isn't present, but Endou and the others aren't so lucky. Meanwhile, a group of people come looking for Tobitaka, and Kudou gave him permission to go out. Endou is so impatient that he starts practicing in his room, and soon all the others do so too. Finally the day of the match come, and Inazuma Japan are quickly overwhelmed by Big Waves Hissatsu tactics: Box Lock Defense. Will they be able to break the defense before the match is over?