Chisato, a busty mom with unfulfilled desires from the same neighborhood association, finds herself constantly aroused by Yukie’s large breasts. "Am I a lesbian?" Yukie worries. One day, Chisato consults Yukie about her sex life, and Yukie confesses her own attraction to Chisato. Startled, Chisato is then invited to engage in sex with Yukie. The two women's escalating pleasure in their first sensual experience together leads to an uncontrollable frenzy in this salacious story of mature women discovering lesbian love.