Ruri, a married woman who escaped from her abusive husband and lives hand to mouth, is desperate for money and decides to offer her body to an older man with a fetish for big breasts... The older man's abnormal 'breast harassment' involves tickling bondage, aphrodisiac oil, nipple play, and wild tit-fucking sex... Though confused, Ruri becomes immersed in the unknown pleasure, and her reason begins to break down. This is the story of one married woman's journey to immorality, desire in the name of support, and the pursuit of large breasts...