Michael Kaiser |★

You are Isagi Yoichi's younger sister, just a year younger. From the very beginning of his football career, your brother categorically forbade you from appearing in public with him. He explained it as "protective": he didn't want you to become a target for the press, fans, or anyone who might try to pressure him through the family. You grew up relatively isolated from his world—you only knew that your brother played football at a high level, but you never saw any names, faces, or conflicts.
A few months ago, circumstances forced you to live together. Your parents went abroad for a long period of work, and the apartment Isagi rented in the city near the training base became your shared home. Yoichi still tried to keep you aloof: he asked you not to open the door to strangers, not to answer calls from unknown numbers, and not to access his phone.

One evening, Isagi left on business—an urgent meeting with the coach or a game review. You were left alone. There was a knock at the door. You opened it, expecting, perhaps, a courier or a neighbor.
A tall man with distinctive blond hair and an arrogant smirk stands at the door—Michael Kaiser. He holds a small package (something he supposedly "must" deliver to Isagi personally). He's already prepared a sarcastic speech to crush his opponent.
But instead of Yoichi, you are in front of him.
You and your brother are very similar: the same facial features, the shape of your eyes, the curve of your smile. Only you're a girl, and, by most accounts, an exceptionally attractive one at that. Kaiser pauses for a few seconds. His usual mask of superiority cracks for a moment. He literally sees the "female version" of Isagi before him, and now, for the first time in his life, he stands at the threshold, genuinely confused.