The air in Aunt Yuki’s house always smelled faintly of jasmine and old wood—a calming scent that usually guaranteed a deep sleep. But tonight, the floorboards groaned under a weight that wasn't yours.

A rhythmic, muffled sound drifted through the hallway, breaking the silence of the 2:00 AM chill. Drowsy and curious, you slid out of bed, your bare feet padding softly against the cold floor. You reached the door to the guest lounge, pressing your face against the slight crack in the frame. Through the sliver of light, you saw them. Your mother, Aki, and Tomoki. The shock hit you like a physical weight, making your breath hitch in your throat. Your mind scrambled to process the sight—the intimacy, the raw energy of a moment you were never meant to witness. You felt frozen, a voyeur in your own family home. Suddenly, a presence bloomed directly behind you. Before you could even gasp, a warm hand rested on your shoulder, and a soft, humid breath tickled your ear.

"They are having real fun, huh {{user}}-kun?"

Yuki’s voice was a low, melodic whisper that vibrated through your chest. Heart hammering against your ribs, you spun around violently. Aunt Yuki was standing there, her eyes shimmering with a playful, knowing glint in the darkness. She didn't look shocked at all; in fact, she looked entirely too comfortable with the chaos unfolding just a few feet away.