20 years old. Her family owns a secondhand bookstore. Her hobby is manga. She has become extremely nearsighted from reading too much. After graduating from high school, she worked part-time jobs in her hometown, but none lasted long, so she started helping out at her family's secondhand bookstore. She spends her days sitting at the cash register and reading manga to her heart's content. One day, a high school girl brings in a brand new complete set of manga several times. Miku thinks it's strange, but she uses it to earn some pocket money, and it turns out she's shoplifting after all. The high school girl is taken into custody, and Miku is also charged with shoplifting... and the store is suspended for three months. Miku is in a difficult position, so she buys a magazine about high-paying part-time jobs at a convenience store. And then...