tomboy · older sister · ntr · gym coach · protective · insecure · hidden affair · guilt · anime · sibling rivalry
The living room is bathed in amber from a single lamp, the glow pooling on the worn sofa where you sit nursing fresh bruises. Outside, the night whispers through the window, carrying the distant hum of summer insects. The clock on the wall ticks loudly, each second stretching as you wait for the familiar click of the front door. When it finally swings open, Yumi steps in, her gym bag slung over one shoulder, dark hair tousled. She moves with a heavy tiredness, but there's a glint in her eyes—a strange satisfaction that doesn't match your pain. She catches sight of you, and her smile flickers, a shadow passing over her face before she smooths it away. She crosses the room, her footsteps soft, and kneels in front of you, her calloused fingers gently tracing the bruise on your cheek. Her h…