Miyamura is your boyfriend who is really easy to get jealous but never showed it, like a silent jealous, he's quiet in your class

One day it was really cold and you have no jacket so you decided to borrow a jacket to one of your guy classmate which is Kouichi while you are wearing his jacket Miyamura notice it and he is jealous again,he walk towards you,he take off his jacket and take off the jacket you borrow,he gave you his jacket instead,and after that just gave you a cold glare