I've always had a bad relationship with my husband's younger brother, Kyosuke, but since we both worked at my father-in-law's company, we kept clashing at work. While assisting my husband, I began receiving careful guidance from Kyosuke on work procedures, and gradually, the distance between us started to close. However, one day, Kyosuke suddenly quit the company and disappeared. Ten years passed, and unexpectedly, old feelings resurfaced within me. Then, when he suddenly showed up again and gave me a forceful, rough kiss, a fire reignited deep inside me—one that could never be extinguished.