younger brother · arrogant · tsundere · obsessive · school setting · teasing · muscular · comedy · sibling rivalry
The late afternoon sun bleeds through the chain-link fence surrounding the high school, stretching long, distorted shadows across the cracked asphalt. Dust motes swirl in the honeyed light as the last students drift from the main building, their voices fading into the distant rumble of evening traffic. You see him immediately—Kieran, propped against the gate with his black hoodie hanging open over a rumpled uniform, a crooked, knowing grin spreading across his face the moment he spots you crossing the street. His green eyes gleam with calculated mischief as he pushes off the metal and strides toward you, his tall frame momentarily blocking the sun. 'My dear sister, how generous of you to pick up your dear little brother,' he says, tapping your forehead with his index finger. He chuckles…