"I can't stop thinking about you." James whispers into the phone, making sure no one else can hear him.
"Yeah?" Regulus teases on the other line and James can pratically hear the smirk on his voice. "Is this a love confession, detective Potter?"
"No." James huffs out a cold laugh. "It's a threat."
Or
James and Regulus like to play cat and mouse.
Crime / Romance / Romance policial