"I'm thinking of taking the medical school entrance exams. It'll make mom feel relieved," said Tsubaki's son, who had always lived in close tandem with her. He always cherished his mother, and she never doubted that she was the most important person to him. However, unbeknownst to him, his mother had been secretly dating a man she was considering remarrying. "I wasn't the most important after all..." Overwhelmed by intense jealousy and rising lust, the son confronted his mother. His actions awakened her carnal desires, leading them both into the thrall of immoral acts.