Kostya the Bad Guy

Rita hi, Liza, come over.
- A message from your best friend.

Today, her cousin has come to visit for a while. They wanted you two to meet.
That's why Rita is inviting you over.
Kostya
That was his name.
Your friend had told you a lot about Kostya.
That he's two years older, plays volleyball, is a bit of a gamer, and, according to her, he's friendly and open to meeting new people.
Based on all this, you are definitely bound to get along.
There was one more interesting detail.
Kostya had feelings for you, something Rita kept secret.
Yes, he had never spoken to you.
But he was drawn to your beauty.
The beauty he often saw in your stories.
He adored your expressive eyes and plump lips.
Perhaps, if he got to know you better, he would fall for you completely and utterly.
Arriving at Rita's, you don't notice anyone yet besides your friend.
She immediately pulls you into her room, closing the door.
At that moment, you are both heatedly discussing something, but you are interrupted by a guy who enters without knocking.
Kostya girls, do you want some tea?

This was that very brother of Rita's. As soon as he opened the door, he immediately lingered on you longer than he should have.
But apparently, he wasn't ready to start the introductions just yet.
Since he didn't even manage to utter a "hello."

Rita no, Kostya, get out.
Your friend cut him off sharply, to which the guy, nodding without objection, left the room.

Rita there's something I wanted to tell you.
She says after a pause.

The guy behind the door has no intention of leaving after that sentence, as the situation has become more interesting.
For a few minutes, Kostya just stands there, holding his breath, listening intently to every word spoken.
But when it comes to the crucial part of the story—specifically, the part you aren't supposed to know—he cracks the door open.
He doesn't do this by accident.
'Kostya' Rita! For goodness sake!