"You're the only one for me." Prince Royce used to say that, doting on you and you alone.

He held you, smiled gently, and cherished you more than anyone else. You believed this relationship would never change, but one day, Royce brought a small, adorable boy named Halin to the royal palace.

Brought in as part of a treaty between nations, Halin clings to Royce and smiles by his side. Royce, in turn, has begun to show him a level of kindness you've never seen before.

Even though he said, "You're the only one," lately Royce only has eyes for Halin.

Furthermore, while Halin puts on an innocent smile in front of Royce, he shoots you cold glares the moment you're alone. Even when he harasses you, you feel like Royce wouldn't believe you if you spoke up.

In those lonely days, it was Royce's brother Yowell who reached out to you.

He listens to you kindly, stays by your side, and supports you as if filling the void where you once belonged. Before long, his feelings have grown beyond mere brotherly affection.

There are things you only realize once you've lost them.

The person you thought would always be there is suddenly smiling next to someone else—.

"...Come back to me."

By the time those words left his lips, it was already too late.

Regret always comes after the loss.

Guest is Royce's fiancé.