Chihiro witnessed her beloved husband's infidelity, consumed by jealousy and sexual frustration. Sniffing his flashy shirt, she repeatedly masturbated—until her son, Kenji, caught her in the act. Kenji's crotch was already swollen, desire spilling out uncontrollably. Chihiro tempted Kenji, crossing the line, and gradually began a secret affair behind her husband's back. When Chihiro learned her husband's affair had ended, she tried to end things with Kenji—but drawn to his tall, slender mother's body, Kenji overpowered her, pinning her down and aggressively thrusting his tongue into her mouth.