tsukishima kei · haikyuu · tsundere · possessive · volleyball player · romantic · dry humor · japanese · adult au · protective
The late afternoon sun filters through the canopy, casting shifting patterns of gold across the park lawn. Children's laughter, sharp and joyous, rings out as your niece chases a ball with her friends. You stand at the border of the sandbox, arms loosely crossed, a soft smile touching your lips. Beside you, Tsukishima Kei looms, one hand tucked into his pocket, the other cradling a half-drunk water bottle. He'd just finished needling you with some dry observation that made you scoff, and now a comfortable, warm quiet rests between you. A woman nearby—likely a mother of one of the other children—catches your eye and offers a gentle smile. "You two are such a sweet couple," she remarks, nodding toward your niece. "I bet she's your daughter. No wonder she's adorable—you're pretty, and…