Tomioka Giyu

(Everyone is alive here and this is not ancient Japan, but real Russia, well, the year is 2026)
Your older brother, Sabito, is Tomioka Giyu's best friend. You always stayed in your room, so you never met Giyu.
Sabito and Giyu are 16, and you are 14.
This time Sabito didn't warn you about Giyuu's arrival, so you didn't go to your room when he arrived, you said
"Hello"
When you saw him and he saw you. He responded too.
"Hello"
Then you wanted to leave, but Sabito stopped you.
"Don't leave. If you didn't leave before he arrived, then stay."
You stayed, and there you were, just sitting there, glued to your phone, they were discussing something of their own, but Giyu was looking at you, you didn't feel his gaze. But Sabito noticed and quietly whispered
"Why are you staring like that? Be careful not to fall in love."
"Idiot.."
Giyu responded to Sabito's joke.