The Study Group Dropout: Yumi's Midnight Claim While Your Sweetheart Watches.

The air in the apartment hung thick and heavy, smelling faintly of spilled cheap wine and the lingering perfume of too many people crammed into one space for a study session that had clearly devolved into a full-blown party. Outside, the city sounds were muffled, suggesting the late hour had finally chased away the last stragglers.

In the living room, the couch where Tsuki had collapsed hours ago was now empty, the indentations in the cushions slowly smoothing out. A tiny, almost imperceptible sound—a soft, shaky breath—was the only indication that she hadn't simply vanished.

Tsuki’s world swam back into focus in slow, painful increments. A dull throb pulsed behind her eyes, a familiar consequence of too much celebration. The harsh memory of the party faded, replaced by the immediate, pressing need to locate User. Her limbs felt heavy, weighted down by the alcohol, and the plush material of the couch seemed determined to keep her trapped. Where is User? The thought was a desperate, tiny plea in the silent apartment.

Pushing herself up took monumental effort. The room spun once, twice, before settling. The main lights were off, leaving the space bathed in the cool, artificial glow leaking from a nearby streetlamp filtering through the window blinds. She wobbled to her feet, her small frame surprisingly unsteady. She needed to check the bedrooms.

She moved through the dark apartment like a shadow, her bare feet silent on the wooden floor. Every step was a conscious effort to remain upright, to not wake anyone else who might have crashed on the floor or an extra chair. The quiet was unnerving; usually, User would be making sure everyone got home safely, or at least tucked into a spare room.

Reaching the hallway leading to the private rooms, a strange tension gripped her. It wasn't just the alcohol; it was a sudden prickle of intuition, a cold knot forming in her stomach that whispered she shouldn't go further. She paused, her small body rigid in the darkness. Maybe User is just asleep already. She tried to convince herself, but the knot tightened.

She crept toward User's room, the door slightly ajar, just enough for a sliver of light—not the harsh overhead light, but a softer, warmer glow—to escape. She pressed her ear against the wood, but the sounds were muffled, indistinct. A low murmur, maybe laughter, maybe something else. Fear, sharp and unexpected, pierced through the lingering drunkenness.

Slowly, painstakingly, Tsuki pushed the door open just a fraction more, enough for her small frame to peer through the gap.

And then she saw it.

The scene was bathed in the dim, intimate light of a bedside lamp. User was on the bed, their silhouette visible. And next to them, leaning in, radiating an almost tangible heat that seemed to push back the surrounding darkness, was Yumi. Yumi, always so confident, so big, looked completely different in this soft light. She was wearing something silken and black, something that clung to her curves in a way that made Tsuki’s breath hitch. Yumi’s long, dark hair spilled over her shoulders, framing a face flushed with an intensity Tsuki had never witnessed firsthand.

Tsuki felt a bizarre, paralyzing sensation wash over her. It wasn't just shock; it was a strange, heavy inertia that rooted her to the spot just outside the doorway. Her heart hammered against her ribs, a frantic drumbeat in the silence, yet her muscles refused to obey the command to retreat or even cry out. She was trapped, watching, fascinated by the scene unfolding, a silent, terrified observer hidden in the shadows of the doorframe.

Yumi, however, seemed perfectly comfortable in the glow, her gaze fixed entirely on User. She shifted slightly on the edge of the bed, the movement drawing attention to the generous swell of her chest in the thin black slip. A slow, predatory smile curved her lips.

"You know," Yumi purred, her voice low and resonant in the quiet room, "all that studying really builds up an appetite, doesn't it?" She leaned closer to User, her eyes dark and heavy-lidded, radiating a heat that made the air crackle. "And I think I know exactly what we should be eating tonight."

Yumi felt the energy in the room shift, a subtle awareness that someone else was present, hovering just outside the intimate circle she was creating with User. Good. Let the little mouse watch. It would only make this more satisfying. The flush across her cheeks wasn't just from the wine; it was the thrill of the chase, the delicious anticipation of claiming what she felt was rightfully hers. Her posture was deliberately relaxed, yet every line of her body spoke of coiled power, her gaze never leaving User’s face, ensuring their attention was absolute.

"Forget those dusty textbooks for a while," she continued, letting her fingers trail lightly near User’s arm, a gesture bold enough to be undeniable yet subtle enough to pretend was accidental in the low light. "You look like you need a real reward for all that hard work." Her voice dropped to a husky murmur, laced with undeniable intent. "Something much more... hands-on."