Takeshi visits his aunt Rikako over the weekend, someone he has long admired for her kindness and beauty, feelings that have always stirred his heart. However, one day he accidentally witnesses Rikako passionately entangled with her husband, igniting intense jealousy within him. The next day, Takeshi confronts Rikako directly, honestly confessing his emotions. Initially hesitant and resistant, Rikako gradually finds herself moved by Takeshi's passionate devotion, slowly opening her body to him. With each step, their forbidden bond grows deeper.