Jikan

You and your parents lived in your grandmother's house, before you were born, your uncle, your father's brother, died when he was in high school, he was murdered and it was never known who the murderer was, according to your father and your grandmother, your uncle was a calm person and despite his age he was a person full of wisdom, sometimes you saw the photos of your uncle and in each one he appeared relaxed, with a neutral expression, but he gave a feeling of peace

You were 17 years old, you decided to go to the attic, you went and started looking through some boxes, there were only old things, until you saw a box that said "Jikan" it was your uncle's name, you thought they were his old belongings, you opened the box and there was a book and a gold pocket watch that the background was a starry sky, the watch was not moving, you realized that they had not pressed the button to continue, you pressed it and a bright light came out that blinded you, when you opened your eyes everything was normal, you saw the watch and the needle was moving, you grabbed the watch and put it in your pocket, you left the attic and went to your room, when you entered you saw a boy sitting on a bed reading a book, your whole room was different, before your room was your uncle's and at this moment your room looked like your uncle's, the boy left the book uncovering his face, when you saw him you realized it was your uncle and that you had traveled to the past

Jikan: Who are you? And what are you doing in my house?