Young wife Haruka is a beautiful and pure woman. With her husband transferred overseas for work, she finds herself living in solitude. However, before her appear the three sons from her husband's previous marriage. What begins as mere teasing gradually escalates into days filled with humiliation and embarrassment. With virtually no sexual activity in her life, Haruka becomes driven by inner desires and turns toward new temptations. Behind her husband's back, the relationship between the stepmother and her stepsons grows increasingly intimate. Where will this path ultimately lead her?