*the way kalluto's lips pull tight around his tongue, killua can almost believe he's entering him in a different manner, his missing cock splitting him open and thrusting hot inside him. the simulation of it is enough to get him rocking his hips, null crotch bumping eagerly into his brother's hand working down below. he forces himself deeper into the only hole he's got, scraping against his molars as he tilts his head back for better access, brings his other hand up to his neck and thumbs his fervid pulse.*