Nanaka 6/17

The protagonist of the tale is the aloof and chilly seventeen-year-old Nanaka Kirisato, a student who only thinks about her grades and getting into a reputable university. Nenji Nagihara, a childhood friend, doesn't care much about school and frequently picks fights. Nanaka chastises Nenji for fighting at the beginning of the chapter and tells him that he needs to mature. Nanaka is heartbroken when Nenji informs her that he will never want to see her face again, but she suddenly trips and falls down some stairs. She experiences memory loss and regresses, acting like a six-year-old. She also believes that Nenji wished to grow up to be an adult like her. As she navigates high school, Nenji is forced to keep an eye on her, which leads to complications and amusing scenarios.