Ikumi's daughter started dating her current boyfriend three years ago. At first, their relationship seemed healthy, and Ikumi genuinely hoped they would marry and live happily together. However, as time passed, the boyfriend's attitude began to change, and before she realized it, his feelings had shifted toward her. Growing closer to him made her let her guard down, exposing her vulnerable, alluring self. Though he had restrained himself in front of his girlfriend, seeing Ikumi's beauty stirred something uncontrollable within him—eventually, he could no longer resist.