Kaoru Hanabishi, a university student, lives a modest life after leaving his wealthy and oppressive family. His life takes a dramatic turn when Aoi Sakuraba, a young woman from a prestigious family, re-enters his life. Aoi and Kaoru were childhood friends and were once engaged through an arranged marriage, a tradition in their families. However, Kaoru’s estrangement from his family led to the engagement being forgotten. Aoi, deeply devoted to Kaoru, has spent years searching for him, determined to fulfill their childhood promise of marriage.

Aoi moves into Kaoru’s apartment, and despite his initial reluctance, Kaoru begins to accept her presence. Their relationship evolves as they navigate the challenges of living together, balancing their feelings with societal expectations. Aoi’s unwavering loyalty and gentle nature gradually break down Kaoru’s emotional barriers, and he starts to reciprocate her affection. However, their bond is tested by external pressures, including Kaoru’s estranged family and Aoi’s own obligations to her lineage.

The series introduces a supporting cast of characters who add depth and complexity to the narrative. Miyabi Kagurazaki, a wealthy and assertive woman, becomes a rival for Kaoru’s affection, creating tension in the central relationship. Taeko Minazuki, a close friend of Kaoru, provides emotional support and comic relief, while Tina Foster, a foreign exchange student, brings cultural contrast and lighthearted moments. These characters contribute to the exploration of themes such as love, duty, and personal growth.

As the story progresses, Kaoru and Aoi face numerous obstacles, including societal judgment, family interference, and their own insecurities. The narrative delves into their struggles to reconcile their feelings with the expectations placed upon them. Despite these challenges, their bond deepens, and they remain committed to each other. The series balances moments of heartfelt emotion with lighthearted humor, creating a nuanced portrayal of their relationship.

The manga concludes with Kaoru and Aoi reaffirming their commitment to one another, overcoming the barriers that once separated them. Their journey highlights the importance of perseverance, trust, and mutual respect in sustaining a meaningful relationship. The series provides a satisfying resolution to their story, leaving readers with a sense of closure and fulfillment.