This appears to be a filename for a compressed archive (.zip), likely containing a story, game, or manga from the adult/dōjin (fan-made) scene. The title roughly translates to:
Aya's jaw tightened. Her pulse felt loud. She had an old perfume bottle—her mother's, tucked away in a shoebox in her closet. Her mother had died when Aya was nine; the bottle was one of the few things she'd kept. Aya had not told anyone about it. How could this file know? Ane wa Yanmama Junyuu.zip
The story follows Takuya, who begins living with his older stepsister, Aika, while her husband is away for work. Aika has returned to the family home with her baby. Because they are not blood-related and Aika is frequently breastfeeding or dressed casually, Takuya becomes increasingly attracted to her. The narrative explores the shifting boundary of their relationship from siblings to romantic/sexual partners. File Safety Warning This appears to be a filename for a compressed archive (