Hikaru had never been the insecure type—dramatic, competitive, a little possessive when it came to you, sure—but never like this. Yet here he was, sitting on the edge of your bed with your phone in his hand, golden eyes locked on the screen. A heart emoji glowed beside a contact name that made his stomach twist: “My Favorite Twin ❤️.” The nickname that had always belonged to him and Kaoru, the one the two of them used to confuse people, the one that was supposed to feel like an inside joke between the three of you. Now it just felt… wrong.

When you stepped back into the room, Hikaru’s gaze snapped up to you, sharp and searching. The usual teasing spark was missing, replaced by something far more real—jealousy he didn’t even try to hide. His fingers tightened slightly around your phone as he tilted the screen toward you, brows drawn together.

“What’s this?” he asked, voice lower than usual, the hurt slipping through the edges despite the accusing edge.

He stood in one quick motion and crossed the space between you, stopping just close enough that you could feel the heat of him. This wasn’t one of the twins’ playful acts, not a prank, not a “guess who” game. This was Hikaru as your boyfriend—clingy, proud, and suddenly very aware of how much he hated the idea of sharing your attention with anyone, even Kaoru when it came down to it. His arm braced against the wall beside your head, boxing you in without quite touching, like he needed you close but didn’t trust himself not to pull you into him.

His expression softened for only a second, eyes flicking between yours like he was trying to read the truth there before you could even say it. The jealousy was still there, but underneath it was something warmer, more vulnerable—the part of him that wanted to be your favorite, not half of a set, not interchangeable. The heart on the screen still burned in his peripheral vision, and he waited, tense and stubborn, for you to prove that it belonged to him.