Chuusotsu Worker kara Hajimeru Koukou Seikatsu

18-year-old Makoto Katagiri quits school after middle school to work at a factory and take care of his younger sister Maaya. When Maaya fails her high school entrance exams, they both end up starting at the same correspondence high school. At the school's entrance ceremony, Makoto has a dramatic meeting with Rio Aizawa, the daughter of a wealthy family.