we shine like diamonds (слэш)

Oikawa is nine when he first hears the word. The boys on the playground whisper it like it's dirty, like the way they daringly mutter the word fuck and then look over their shoulders to check their parents hadn't heard.
"You know Abe-kun from class?" they snicker, hands cupped around their mouths like they're passing along a filthy secret. "I hear his older brother is... gay."