Short story is short. Written for Kink Meme fill. Here is the prompt:
Kadota stumbled into a classroom where Shizuo was screwing someone. With the blonde's back to him and only a pair of pale thin legs around his waist, Kadota didn't know who it was until...
Cue in completely cluess!Kadota who's wondering who the crap the person could be. Cracky until he sees it's Izaya, of call people.
Kadota frowned a little at the sounds he heard from the classroom. Those were not sounds that classrooms made, let alone students…not unless. He knew it was wrong to look…he couldn't stop himself though and he peeked in through the open door. The school was supposed to be empty right now. Shizuo was in the classroom? No he was with…Kadota felt his cheeks burn in realization. He saw two thin legs wrapped around the blonde's waist as Shizuo …well there was only one way to but it right? Shizuo was having sex with someone. But who? He knew it was wrong to be watching, he knew he should reeeaaaaally just walk away because he knew what Shizuo was like and he knew he was a dead man if Shizuo ever learned Kadota had stumbled upon this scene. The perverse sounds of skin hitting skin…the low grunts of pleasure Shizuo gave and the lewd moans being given by whomever this was he was with…Kadota felt his cheeks burning so red he was certain they would stay that way forever.
"F-fuck…g-gonna c-come," He heard Shizuo groan out and the other person only mewled louder at his words. Kadota could tell when they came but what happened next would be forever seared into his memory as the day he learned something he never should have. Legs sat up and he saw first black hair as the person nipped at Shizuo's jaw in a borderline affectionate way.
"Shizu-chan…mnn~! I really liked the classroom, let's do it in the library tomorrow though ne~?" His partner…Kadota felt his jaw drop. It couldn't be…but it was. His partner was none other than Izaya Orihara.