Urara Yūki, a twenty-nine-year-old university librarian, has been raised by her grandparents after losing her parents young. When her grandfather’s health begins to decline, she throws herself into marriage hunting, treating the search as a practical transaction: she wants the title of “married couple” to put her grandparents at ease, and she screens potential partners by conditions alone, skipping romance entirely. One day on campus, she is publicly confessed to by Suwa Hiromi, a twenty-one-year-old junior who transferred to the university and is known for his blunt, straightforward personality. Urara dismisses him immediately—he is too young, still a student, and not part of her practical plan—but Suwa refuses to give up. He keeps approaching her with earnest, unguarded affection, gradually wearing down her resistance.

The story follows Urara as she reluctantly agrees to date Suwa while continuing her job hunt for a husband, only to find herself genuinely falling for him. Their relationship deepens through everyday moments: cooking together at Christmas, visiting her family for New Year’s, and taking a trip to a hot spring. However, as Suwa approaches graduation and begins looking for jobs, his new female colleague becomes a source of jealousy and misunderstanding, causing the couple to drift apart. Additional tension arises from Urara’s lingering sense that she cannot rely on someone so much younger. The narrative arc shifts when Suwa’s persistence and sincerity eventually prove his commitment, and the couple reconciles, growing more serious. In the concluding volumes, Urara’s grandfather passes away, and at the funeral, Suwa—now a working adult with greater confidence—proposes to her again, this time not as a condition but as a promise born of genuine love. The manga ends with Urara accepting that this awkward, all-consuming feeling is her first true love, and she no longer wants to let it go.