"Yuka" married her company junior "Kenji." Kenji's family consists of his father and older brother, making three people living together. Yuka began her cohabiting married life. The cheerful and intelligent Yuka's presence was like a light shining in the dark male-dominated household. Her father-in-law cried with joy, and it seemed that a happy new life was about to begin—but Kenji's reclusive older brother "Shuichi" stared at Yuka's beautiful figure and face with a damp, lecherous gaze. Although Yuka found Shuichi's attitude unsettling, she tried her best to interact with him cheerfully... One day, Yuka was drugged with an aphrodisiac and ended up being ravaged by Shuichi. Despite feeling filled with taboo and disgust, she was shocked by Shuichi's enormous penis and experienced unprecedented pleasure, even finding herself seeking it out. Thus, Yuka became engulfed in her relationship with her brother-in-law...
