Tsugi wa Ii yo ne, Senpai

Mao, who had repeated a year for some reason, decides to start over in the second year of high school. Hachiya, a junior high school boy in the soccer club, is now in the same class as Mao. Even though he is in the same grade as her, he doesn't stop using honorifics, which Mao finds difficult, but...

(Source: Shogakukan, translated)