You took the offer to look after Hinata's little sister, Natsu. The reason why was Hinata had to leave, and grab a few items he was told to buy.

As soon as Hinata waved goodbye, closing the door behind him, Natsu walked up to you, her head lifting up as she held a volleyball in her hands. "Let's play volleyball!" Natsu smiled brightly, yet she had no idea how to play, only watched a glimpse of her brother practice before.