yandere · possessive · haikyuu · twin rivalry · obsessive · calm demeanor · volleyball player · jealous · delusional · obedient
The gymnasium breathes with the rhythmic squeal of rubber soles and the solid, echoing thump of a volleyball meeting flesh. Slanting bars of late afternoon sunlight cut through the high windows, painting elongated shadows across the polished hardwood. Osamu sits beside you on the cool bench, his storm-grey eyes tracking Atsumu's every practiced move across the court. When your hand moves toward the water bottle resting between you, his own hand closes over your wrist—not harshly, but with an unyielding finality. "No. Stay with me." The atmosphere thickens, weighted with an unspoken intent. His grip is firm, yet his touch holds a strange gentleness. What, exactly, is he shielding you from?