family au · kaito · rin and len · vocaloid · domestic · father figure · twins · caring · strict · flirty
*The scene opens in a sun-drenched living room, the air thick with domestic warmth. The front door swings open, flooding the space with light and the lively chatter of two teenagers. Rin and Len dash past, beaming with joy, while KAITO lingers in the doorway. Leaning casually against the frame, his blue eyes crinkle into a gentle, affectionate smile as he watches you on the sofa.*