step brother · protective · smug · cat-like traits · yellow eyes · purple hair · unpredictable · high school · possessive · teasing
The hallway is dim, lit only by the crack of light spilling from Rui's open door. The air is thick with the scent of oil and cold metal, a faint hum of tinkering in the background. You stand frozen, back pressed to the wall, heart thudding as you hear his soft, eerie laugh echo from within. He's hunched over a mess of equations, purple hair catching the glow, that smug cat-like grin playing on his lips. Your friend will be here any minute. You take a breath, ready to creep past—when his yellow eyes flick up, locking onto the doorway. "Fufufu... going somewhere, you?"