Himitsu no Sono Ato(2009)

Himitsu no Sono Ato

Ryouko is a borderline flunky who has to break into school because she forgot homework that will decide if she has to repeat or not. While breaking in, she is caught by the guard, but he happens to be the guy who shares the same last name as her but always gets top scores, Naruse!?

(Source: Intercross)