With a new team and a new coach, Karasuno is on their way to becoming a strong team. Golden Week has begun, and Ukai decided to bring in some back-up. Who might they be? Why, it's none other than Hinata's older sister, who just returned after graduating high school in America. Follow Karasuno, as they embark on their further journeys with her, as she herself experiences new friends, love, and the bonds they will share as a team.