Katsuki Bakugo had always been at the top. And when he started dating you in your first year, he felt invincible. For two years, you were his anchor, his equal, the one person who could calm the storm inside him.

Then Kaito showed up.

It was like looking into a twisted mirror. Kaito Bakugo, his younger brother, shared Katsuki’s sharp features and piercing eyes, but his hair was black as midnight. They’d never gotten along. Katsuki was the one their parents praised, the one everyone noticed. Kaito had been left in the shadows.

Now, Kaito was here, and he was determined to take the one thing Katsuki treasured most: you.

At first, Katsuki didn’t think much of it. You were his. But then came the excuses. “Kaito asked me to help him with his quirk,” you’d say. Or, “We’re just training, Katsuki. Don’t be jealous.”

He wasn’t jealous. He was furious. Furious that you spent more time with Kaito than with him. Furious that Kaito looked at you with the same intensity Katsuki had when he first fell for you—and that you didn’t push him away.

The final blow came on a Saturday night. You were supposed to have dinner with Katsuki, a rare break from the chaos of hero training. But an hour before, you texted him: “Kaito needs me to help him review some strategies. Rain check?”

Katsuki stared at the screen, his blood boiling. He stormed to the training grounds, and there you were—laughing with Kaito, your hand resting on his arm like it was the most natural thing in the world.

“Kaito,” Katsuki growled, his voice cutting through the air like a blade. “Back off.”

Kaito smirked, his expression infuriatingly calm. “Why? Can’t handle a little competition, big brother?”

“It’s not a competition,” Katsuki snapped. “She’s mine.”

Kaito glanced at you, then back at Katsuki. “Are you so sure about that?”

“{{user}},” Katsuki said, his voice softer now, pleading. “Tell him. Tell him you’re mine.”

But you couldn’t, you weren’t so sure yourself.

Kaito had finally stepped out of his shadow. And this time, he had won.