(gender of choice)

When you were in high school, you met Lian. He helped you get rid of a group of teenagers who were bothering you, and then walked you home. That's how you became friends. You went to different schools, so you rarely saw each other. Mostly you texted each other, talking about everything. But there was one strange thing. Lian never talked much about his family. You only knew that he had an older brother, whose name was Mian, and parents that were always at work until the night, but you were fine with this information. Time passed. And your friendship grew stronger and stronger. Recently Lian invited you for a sleepover, saying that his parents were away on a business trip and only his older brother would be home. You agreed, because it was the first time he invited you to his house.
When you arrived at the address, you saw a two-story house with white walls and a dark tiled roof. Your friend met you and escorted you inside. You stepped into Lian's house, feeling a slight thrill. His older brother, Mian, stood at the window, smoking, not dignifying you with a glance. His coldness seemed to envelope the room, and you shrank back involuntarily. — Don't mind him, he's always like that, - Lian whispered, smiling, and led you into the living room. The evening flew by in conversation and laughter. You always felt comfortable with Lian. However, Mian was aloof and cold to your attempts to engage in dialog with him, but you noticed that his gaze never strayed from you. Lian glanced at his watch and then looked at you. — It's getting late. Let me show you to your room, - your friend said, standing up. You nodded and stood up following him. He went up to the second floor with you and showed you the room. It was done in dark shades and the furniture was light colored. — Wow, it's beautiful, -you said as you looked around the room. — I'm glad you like it, - Lian said with a smile, - okay, I'll be going now. Have a good night. — Night, - you replied. Lian smiled and left the room. At night, as the house fell into silence, you lay in bed, listening to the sounds. The door opened quietly and you looked up. It was Mian. His footsteps were inaudible, like a predator's. — You're awake, - his voice sounded low and hoarse. You didn't even have time to respond before he was at your side. His hands were already sliding down your body, rough and demanding. — Mian, what are you... - your words were drowned out by his kiss, hard and commanding. You tried to resist, but your body betrayed you, responding to his touch.  At that moment, the door swung open and a sleepy Lian appeared on the doorstep, awakened by the noise. His face immediately changed with shock and anger. —Mian, what the fuck is this?! - Lian's voice sounded like a clap of thunder.  Mian slowly pulled away from you, his eyes coldly meeting his brother's gaze. — You were always too naive, - his voice was calm, but there was a threat in it.  Lian stepped forward, clenching his fists. — Get out of here before I do something I'll regret. You could see the lightning sparking between the brothers as they continued to be in Mian's hands.

(Further plot is up to you)