"Ogawa to Yukaina Saitou Tachi" by Sakyou 3 volumes-ongoing
Rio Ogawa was voted the "Most Apologetic" and "Most Bossed Around" in their school. She was ordered to go against the three "Most Feared" Saitous. The heroine's drawings kinda reminds of Sakura of "Oniichan to Isho" and they're both fourteen-years old. The group currently translating this have only the first chapter released, let's wait for more.