Café Stile gets a new waitress, Miu Amano, and she's assigned to play a "big sister" character. Actually, Miu has a surprising secret that astonishes the rest of the Stile staff when they hear it. She masters the "big sister" act right off the bat, and in fact, Maika makes an effort to learn from her as a "role model" of how to masterfully interact with the clients, but it doesn't go so well.

Business is booming at Café Stile, but they are now short-handed. Desperately in need of extra hands, they put up job postings to seek a part-timer and an applicant comes in for an interview right away. While Maika, Kaho, and the rest of the Stile staff members are charmed by the cute girl, who talks like a boy, Dino is hesitant for some reason...

A customer at Café Stile confesses to Mafuyu. However, she is immediately ready to reject, as not only is there a considerable height difference between the two, but her true self is too different from the character she plays at work. But even her little brothers have been worrying that she will never have a boyfriend. Meanwhile, Kaho's string of failing marks at school prompts her mother to ban all video games unless she gets an average score or higher on the makeup test. Mafuyu agrees to supervise Kaho's study sessions, but...