Tsugi Wa Ii Yo Ne, Senpai summary:

Mao, who had repeated a year for some reason, decided to start over in the second year of high school. Hachiya, a junior high school boy in the soccer club, became in the same class as Mao who repeated a year. Even though he is in the same grade as her he doesn’t break his honorifics, in which Mao found difficult, but…