After a fire displaces high school student Mariko and her sister Mayu from their apartment, they seek refuge with their landlord. Mariko's encounter with the charming son of the landlord, Natsume, a model by profession, leads to a blossoming romance tainted by Natsume's infidelity. Despite their breakup over his involvement with other girls, fate intervenes to reunite the pair, culminating in a heartwarming conclusion as the credits roll. 'A-Girl,' devoid of dialogue, unfolds amidst a backdrop of Japanese pop songs crafted by Okada Tooru and sung in English by SEIKA, evoking a unique cinematic experience reminiscent of silent films with intertitles guiding the narrative.