Rena was drawn to An, her older brother's wife. Even before An married her brother, the two were already in a romantic relationship. Their bond gradually evolved into a lesbian affair. Even after An became part of the family, they continued to spend time alone together at home while her brother was away, deepening their erotic relationship. It began with gentle, soft kisses, slowly progressing into full lesbian play, and eventually An found herself falling completely under Rena's spell. A dependency on Rena began to grow, and her desire for her intensified. This work carefully depicts how their relationship unfolds and develops over time.