The stage this time is the UA dormitory just before season 5's Endeavor Internship arc! In the middle of winter, a hot and blustery cold battle is unfolding at Heights Alliance! Third-year Mirio Togata appears suddenly as the first-year students in Class A are bored during their ban from going outside. He brings with him the card game "Yuuei Heroes Battle," created by the support class. As each student picks cards an...