"I'm thinking of taking the medical school entrance exam. That way, Mom can rest easy." Tsubaki, who had always lived with her son in a codependent relationship, heard his declaration about his future path. The son had always cherished his mother, and the mother believed without doubt that she was the most important person to him. However, he had kept a secret from her: there was a man she was dating and considering remarrying. "I wasn't the most important one..." The son unleashed his intense jealousy and aroused lust onto his mother. His actions awakened her desires, leading them both into a trap of taboo acts.
