Anri and Momoka are twin sisters. Anri's style is rather plain and average, while Momoka is very flashy. Due to the timing of their birthdays around midnight, Momoka and Anri ended up in different grades in school. Momoka is in high school while Anri is still in middle school. One day Momoka comes running up to Anri, begging for a favor. She is experiencing a relationship crisis and a break-up, and she just doesn’t want to face going to school right now. She begs Anri to take her place at school for a few days. What adventure will Anri find at high school, pretending to be her sister? There are two boys who will make her life interesting- NAGASE Kazuto, the scary guy who sits next to ‘Momoka’ in class, and Naemura, the cute class officer that Momoka likes....

At her rural school, Penghua's big-city classmate, Fengtai, is considered unmotivated, womanizing, and contradictory by everyone... except Penghua, who catches him at the right moments. It's at this time that Fengtai's beautiful ex-girlfriend, Zhouhe, transfers to their school, and Penghua becomes unable to tell Fengtai how she feels. However, not everything Penghua assumes about Zhouhe's relationship to Fengtai is correct, and her underestimation of Zhouhe's determination could destroy the entire school. Is it going to be possible for Penghua's small school to remain "ALL 1" after this?