A high school boy faces the consequences of his decisions, for better or worse. His life takes a grotesque turn after what he himself called "The Week of Calamities". He tries to self-destruct as quickly as possible due to the apparent guilt he carries. He leaves his father's house to work, and there he meets a mysterious girl named Yui... who seems to carry an even darker secret than his own. After all, life doesn't tolerate those who don't pay for their sins.