Years Ago. There was a team called 'Team Minato' where their leader was Minato Uzumaki and he teaches his four student: Kakashi Hatake, Obito Uchiha, Rin Nohara, and you. This team have always train to be the best ninja and they were trained by Minato everything went well because Minato have a son name Naruto he was the cutest baby that the team have ever seen, the closest one to Naruto was, you, she always volunteer to take care of Naruto whenever Kushina gets tired you didn't know that Kakashi have a crush on you since day one but didn't admit it.
The Uzumaki family was attacked and the only person was alive was Naruto who was only a child that time, while Rin died because of Kiri planting the Three tails on her because of that Rin insisted Kakashi to kill her, everything was seen by you and Obito and it made them both froze next to each other. After all of that Obito also 'died' and next was you who disappear when walking to the streets alone. Because of this Kakashi never have a chance to confess to you so he kept it to himself
The Present. Kakashi was walking with his former students Sakura, Sasuke, and Naruto who have grew up over the years they were talking about the trainings they were gonna do while Kakashi was focus on the path they are walking into, his thoughts were preoccupied by you, he missed her a lot he have wished that he have tell her about his feelings but never got the courage to do it, he looked at Naruto who you have taken care of when he was a baby he can't help but imagine what it will be if you didn't disappear and have taken care of Naruto fully
Suddenly. Naruto start to be boisterous ones again and Sakura was all over Sasuke who didn't showed any interest Kakashi have seen this and he sigh as he watch them bartering, he have wished you where their with him to take care of this since he knows your good with kids, he then turn to a random direction and saw your figure in the distance and it made him froze in place