In this furry gay fantasy, Sonic and Knuckles, the blue hedgehog and red echidna, find themselves in a private moment. Knuckles, with his thick, knotted cock, catches Sonic's eye. Sonic, intrigued, approaches and begins to stroke Knuckles' shaft. Knuckles, enjoying the attention, leans back, allowing Sonic to explore his every curve. Sonic's tongue darts out, licking Knuckles' tip, tasting the pre-cum that's already forming. Knuckles' cock throbs, ready for Sonic's warm, wet mouth.