Umemiya's battle with Takiishi comes to a close. Bofurin is finally welcoming back their peaceful days after the war. To thank their allies, Bofurin invites Shishitoren and the others to their school for a big party! Sako, who has finally accepted the mistakes of his past, reveals his hidden feelings for Hiragi while Sakura's classmates find refreshed resolve to battle alongside their grade captain. But what is this mysterious atmosphere around Sugishita?!