Silver

There wasn't much about Katsuki Bakugou that Izuku hadn't previously memorized. Each tiny detail had been tucked away, stored in its own personal neuron, and coded to a specific 'Katsuki' file within his brain. The blond preferred sweatpants over jeans and couldn't grow facial hair to save his life. His left shoulder slumped slightly lower than his right when he was stressed; an injury from a villain during their high school days had left it slightly gimpy and prone to muscle spasms when he overworked himself.

Izuku knew it all, and rightfully so. They had been together for quite some time. He had years of practice when it came to memorizing what other people could call subtle features. But, to Izuku, there was nothing 'subtle' about his boyfriend.

Katsuki's eyes were the fiercest shade of burgundy, but only in the evenings. In direct sunlight, they glistened with sparks of gold. Izuku swore they were like rubies, or candied apples, or desire if 'desire' had a pigment. When the sun reflected against them during the golden hour, they burned a deep crimson, and Izuku adored that one the most.

To say that he was obsessed would be tainting something that was pure and sacred with a feeling of negativity. 'Obsessed' sounded wrong. Izuku wasn't 'obsessed' with Katsuki Bakugou. No. Izuku was simply in love.

He was in love with the way-too-long pajama bottoms that the blond wore on Sunday mornings, that mess of hair that always clogged up their shower drain, and the borderline obnoxious way of yawning that could be heard from across the apartment. Those were the little things though. The more important things were more precious, and Izuku didn't mention those often. The reasons why he loved Katsuki as much as he did were not to be shared so easily.

So, when his boyfriend came home from a weekend-long mission in another city, Izuku was quick to restudy and recalibrate. His skin was slightly darker as it always did get after being outside for more than a few hours. Katsuki's eyes held a bit of tiredness from the plane ride home. The slight bags underneath told him that the blond had trouble sleeping on his flight - again.

Izuku had been expecting him home later in the evening but was pleasantly surprised to see him standing in the doorway, kicking off his shoes, and shoving aside a heavy piece of luggage. Video chats didn't stand a chance against the real thing. Even jetlagged and in need of a shower, Katsuki was beautiful. Izuku couldn't resist sauntering over and pulling their bodies together for a tender kiss.

"Welcome home," he murmured against peach-colored lips before diving back in, threading his fingers through golden strands of hair that always felt smoother than silk; even when the back was smashed against his skull from trying to sleep on a plane. He pulled closer, hunting for the familiar warmth that always bloomed when Katsuki's tongue teased his lips. Izuku sighed and opened up, moaning as he reacquainted himself with the hot and wet muscle currently drawing maps in his mouth. The greenette's moan choked off into something akin to a confused gasp, and Izuku squirmed when amongst the heated mess between their lips, he felt something cold tickle the roof of his mouth.

Izuku's nose curled up in confusion. He pulled away, tilting his head to the side and wondered if he had lost his mind during the long hours separated from his boyfriend. Surely, not.

"K-Kacchan?" Izuku questioned.

"Don't tell me you don't like it." Katsuki's warm chuckle reverberated through the entirety of Izuku's core. This man sang 'home' to him in more ways than he cared to admit. He was only gone for a few days and somehow, Katsuki managed to come back with a small surprise.

"If I told you that, I think I would be lying," he cooed back. "Lemme see it."

Sitting in the center of his tongue was a plain silver stud. The way it highlighted Katsuki's features — somehow making him sharper and more readily devourable — made Izuku shiver. He loved Katsuki. He really did. He loved it, even more, when Katsuki brought Izuku's darkest fantasies alive. God, there was just something about piercings Izuku couldn't get enough of. He thought he was being sneaky when his gaze lingered a little too long on images in social media. However, he knew Katsuki knew as much about Izuku as he did his boyfriend.