第 4 集: 天野美羽化身咖啡廳的大姐姐，真花則接受殘酷訓練
The author of the doujinshi, Miu Amano, is hired as the café's "big sister" archetype. She mistakes Maika and Dino for a couple, and begins using them as a basis for her dōjinshi, although she learns from Kaho that Dino's feelings are currently one-sided. Later, feedback from customers reveals that they want Maika to be more sadistic, so the others attempt to "train" her via sadistic anime, dark and violent video games, etc. This results in Maika's persona and attire turning full dominatrix. However, she is relieved when she is told to tone it back again when serving most customers, limiting this to extreme style to only those few who'd actually want it. In the post-credits scene, Maika unintentionally "water tortures" a customer while trying to provide swift refill service. (Source: Wikipedia)