Makoto, a second semester student, fell in love with a girl who is studying in a parallel class.From the responses of classmates he learned that her name is Katsura. A neighbor on the desk, Saёndzhi Sekai, sniff out secret Itou and is ready to help him. As a result, even the Sekai -sama, as she calls herself, falls in love with this kid. But what next? Who chooses Makotoirascibility classmate or a shy girl from the train? eroge School days from the company Overflow.