Uraniwa Ni Ha Niwa Kaicho Ga Iru!! 1 (Kadokawa Tsubasa Bunko)

[Machine Translation] Tomoko Ohba, the fair-minded student body president, is now standing in the backyard of the school, a hangout for troublemakers. The school rules have made this area off-limits, and she has come to seal it off. But then - "What are you doing?" - Tomoko's arm is grabbed by Ryo, the leader of the troublemakers! Oh, he's going to get me! I thought, "Welcome, sir, the Ura Cafe is open. Ura Cafe is open for business. Oh no! He's getting attached to me! They opened the cafe on their own! The ally of justice has joined the school rules violators! From elementary school intermediate level.

心正しき生徒会長・大庭トモコは今、問題児のたまり場=学園の裏庭に立っている。校則で、ここが立入禁止になり、封鎖しにきたのだ。が、そのとき―「何やってんの」トモコの腕をつかんだのは、問題児の親玉リョウ!!ひー、やられる!と思ったら、「いらっしゃいませ。ウラカフェ営業中です」って...ぎゃー!!なんか、なついてきたぁー!?てか勝手にカフェ開いてた!?正義の味方、校則違反に仲間入り!?小学中級から。