At the Tanabata festival, Ryuu Wakui, a strikingly handsome transfer student from England with black hair and blue eyes and a supremely businesslike demeanor, locks eyes with Yukino Miyazaki. He instantly declares that she will be his. Yukino, who has never experienced love before, is completely thrown off balance. Her family runs a flower shop, and each chapter of the story is named after a flower, reflecting this setting. Ryuu is an overachiever—academically gifted, financially savvy, and running his own business—yet his approach to romance is direct and forceful, often leaving Yukino confused and overwhelmed. Over the course of their relationship, Yukino slowly begins to sort out her genuine feelings, learning to distinguish between being swept away and truly wanting to be with Ryuu. She grows from a shy, inexperienced girl into someone who can assert her own desires, while Ryuu's seemingly perfect exterior cracks to reveal a more selfish but also more human side. A late-story twist adds a layer of realism to their bond, testing whether first love can mature into something sustainable. The narrative also touches on the contrast between Ryuu's professional world and Yukino's ordinary school life, with side characters such as Yukino's older sister Yuriko providing support and perspective.