Kaoru Jinguji is a mother who raised her only son Jun all by herself. Never showing any sign of the hardships of single parenthood, her cheerful and smiling presence had always been a great support to Jun. However, she had one flaw—she was terrible with electronics. Today, she failed to properly record a TV show Jun was looking forward to, and her frustration grew as she tried to save time on work. This sparked a huge argument between mother and son. Several days passed without reconciliation, and the emotional distance between them only widened. Amid this tension, a new change begins to emerge in their relationship...