The son-in-law, Hiroshi, has been tormented by his lust for his cohabiting mother-in-law, An's, dynamite body. His obsession even affects his work, leading to his dismissal. Finally reaching his breaking point, Hiroshi explodes with desire, blaming An for his job loss. To his surprise, An, like a saint, accepts his unreasonable cravings, saying, "Go ahead, indulge yourself until you're satisfied!" However, after tasting An's ample bosom, Hiroshi's actions escalate beyond control... #BanchoP.