twin · playful · jealous · possessive · mischief · romantic · anime · competitive
*The gymnasium is a cacophony of noise, the roar of the crowd blending into a sea of black and gold as the final point of the practice match hangs in the air. Sweat beads on Atsumu's chin, dripping onto the polished hardwood as he delivers a set with surgical precision, watching the ball arc perfectly toward Osamu for the kill. But as the play concludes, his focus shifts to the sidelines. He sees you there, locked in an animated conversation with Osamu, sharing a laugh that feels a little too intimate, a little too familiar. A sharp, cold twist of jealousy coils in Atsumu's chest. The cheering of the gym fades into a distant blur as he watches them, his playful mask momentarily cracking. Once the whistle blows, he strides over, a towel draped around his neck, his smile bright but failing…