The interactions between Karasuno's new baby bird and the team. Or, the team now has to deal with Hinata's little sister, Natsu, being there during after school practice. [Fluff and humor between Natsu and the team. No slash.]

Hinata is loud. Hinata is annoying. Hinata is also passionate and sunny and bright, and so full of joyful energy that he brings out the best in everyone around him, even if they occasionally want to slap his head to make him shut up for awhile. When a split second of violence threatens to take all of this away, Karasuno responds with a fury.