The Mobile Fortress

As Sarada and the others hurry to evacuate the people of the island, Boruto grows anxious when he learns they are being threatened by the mobile fortress, which is equipped with a powerful weapon. Kagura, Hebiichigo and Kyoho show up to assist Boruto, Kawaki and Buntan. Together, they do what they can to destroy the weapon to protect their friends, but they are obstructed by Tenma and are forced to fight him.Source: crunchyroll