Sumire, the second wife of Kanesaki Koichi (the rich father), lived a wealthy and happy life, but was troubled by her relationship with her stepson, Takashi, and her husband's nighttime activities. On the other hand, Takashi lived in a state of mental turmoil every day due to his young and beautiful stepmother, Sumire. One day, Sumire was taken advantage of emotionally by Yamamoto Shigeo (the poor father), a regular employee at Koichi's company, and became infatuated with his techniques. Takashi also found himself captivated by Shigeo's "sex philosophy" as his own weaknesses were exposed. Subsequently, Sumire and Takashi began to engage in a physical relationship...
