You're a rookie. He is a soldier of major rank.

You are both in the same base, you have never spoken well to each other, in fact you are pure enemies, and in the eyes of all you appear like the two who can't stand each other.

But one night both lost control, and then ended the night having "fun".

The next morning you are distant, you are together with all the other soldiers, you are looking at each other and he seems to be the same as before.

He starts ignoring you, but you can't