Disclaimer: I don't own KHR!
Tsuna watched the bead of sweat glisten in the sunlight as it trailed a path downwards. Their focused eyes, heavy breathing, and slightly flushed skin was enough to captivate him. It was vexing to know that he was the only one completely entranced, the only one who could feel the tension in the air from that seemingly innocent display of "training". He watched as the drop stilled, just short of falling completely off of their neck.
He couldn't help but swiftly move closer and lick the drop, delighted at the feeling of the muscles underneath his tongue tensing from the sudden action. He followed the trail upwards, relishing the shudder of the person who he held steadily in his arms. He could feel the ever increasing pulse, smiling at the reaction he was able to cause. His gaze was locked onto wide yet expectant eyes as he made his way closer to the tauntingly soft lips he had been eyeing for who knows how long. He loved how he could hear the sudden hitch of breath as he got closer and closer, barely a milllimetre away from tasting those tantalising lips.
He pulled back and smirked at the glare he was given, amusement dancing in his fiery eyes. He chuckled lightly at the slightly trembling figure in front of him, calmly watching. Those dangerous yet beautiful eyes were dark with lust, chest heaving from expectancy, those usually pale cheeks flushed, lips parted invitingly, and those delicious little shivers of anticipation every time Tsuna's gaze flickered from eyes to lips. The person in his gaze was completely paralysed.
Oh, was he going to enjoy this.
*.*.*.*.*.*.*.*
I didn't have a specific person in mind when writing this, so it's completely up to you! You could also self insert since I tried to avoid describing the person as much as possible. It's the first time I've ever written anything like this (irl failed me with experience here), so hopefully it wasn't too cringe worthy and you enjoyed it!