らくがきオーバーハート

The main character is back to his hometown for the first time in several years. It seems the town hasn't changed at all. His life is boring just like before...?  No, it's wrong.

He finds a lot of graffiti at school, on the desk, at the corner of the classroom and so on. He soon joins the Graffiti Research Club, which does research or investigate the graffiti found at school. Through various activities, he becomes friends with a lot of students and gradually falls in love with a girl...