Yukionna to Kani wo Kuu

A certain summer day, as the cicadas sing loudly. A man with no money and no place to belong tries to end his life, however is unable to take the last step. While wavering between life and death, he sees a gourmet food program on television, and realising he's never once eaten crab in his life decides that "For my last day on this Earth, I'll eat crab". Settings his sights on the wife who lives in a high-class neighbourhood that he happened across in a library, he forces his way into her home. And thus, he demands money from her, however... things go in an unexpected direction....(Source: MangaUpdates)