Rirumu, a 9.5 cm-tall fairy princess from the Muglox World, partners with human Dylan Yuki while relentlessly pursuing her fiancé Mirmo, whose resistance stems from seeing their bond as platonic. Her romantic crusade includes persistent—and disastrous—culinary efforts, crafting bizarrely inedible dishes that repel Mirmo. Armed with a tambourine as her magical tool, her spells often backfire, complicating situations she aims to resolve. Yet she remains a proactive force in human relationships, strategically pairing Dylan with his classmate Katie Minami, having chosen Dylan precisely to align with Katie’s unspoken affections.

Innocent yet assertive, Rirumu oscillates between playful charm and aggressive determination in her quest for Mirmo’s heart. Her loyalty extends to championing Dylan’s dream of becoming an author, honoring her duty as a wish-granting fairy. Though her magic falters, her selflessness emerges in critical moments, aiding others despite her limitations. The manga concludes with her persistence rewarded as she marries Mirmo, resolving their fraught dynamic.

Bound by royal lineage and a family-arranged engagement, Rirumu’s narrative weaves comedic mishaps with emotional stakes, navigating unrequited feelings while balancing her regal obligations. Her partnership with Dylan deepens her understanding of human emotions, shaping her growth as she bridges fairy traditions and personal yearning. While her magical prowess remains erratic, her influence on pivotal romantic arcs cements her role as a catalyst for love and connection.