Makoto Sannomiya transfers to a new high school wearing a poker face, hiding his true purpose: he must find a specific female student. That student is Azami Yako, the daughter of a powerful CEO and, as it turns out, his arranged fiancée. Makoto has only seen a middle-school photograph of her, and he imagines a refined, elegant young lady. The moment they finally meet, that fantasy shatters. Yako is nothing like the picture. Her hair is a tangled mess, she eats with appalling manners, she mumbles to herself constantly, and her every gesture is fidgety and awkward. Her classmates find her “cringe,” and Makoto is bitterly disappointed. Yet he made a promise—to his own deceased parents and to the Azami family—to make this engagement work. Determined to honor that promise, he resolves to fall in love with Yako, no matter how much it might kill him.

The story unfolds at their ordinary high school, where Makoto must navigate not only Yako’s quirks but also the colorful cast surrounding her. The class representative, Kirihara Kiri, is a stern but curious leader who keeps a close eye on the unusual couple. Etchu Sayori, a classmate with a knack for handling Yako’s eccentricities, becomes an unexpected ally and a source of comic relief. Makoto also learns that his own poverty is a driving factor: his uncle Chuya is deeply in debt, and a debt collector named Hebinome—a intimidating yet oddly soft-touched woman—regularly pressures him. Hebinome’s presence adds a layer of financial tension, as Makoto’s hope for a better life rests on solidifying the engagement.

Early narrative arcs introduce Yako’s family. Makoto visits the Azami household and meets Yako’s mother, Kiku, who reveals fragments of Yako’s past and hints that her odd behavior may stem from a sheltered upbringing and pressure to be perfect. At school, Makoto and Yako slowly build a strange routine—he tries to correct her messy habits while she, in her own way, begins to rely on him. Side characters like the awkward delinquent girl Tobinai Tomori further complicate the dynamic, as they are drawn into Yako’s orbit. The manga balances romantic comedy with a touch of horror-style comedy, emphasizing Yako’s bizarre mannerisms and the absurdity of Makoto’s situation. As the volumes progress, Makoto’s initial determination evolves into genuine affection, and Yako’s hidden sweetness peeks through her chaotic exterior, setting the stage for a heartfelt boy-meets-girl story about accepting someone exactly as they are.