Shusaku, who is the second son of the Kitazawa family, is going through hard times. He fails his job interviews for a patisserie position, which he hopes to become. Except for Shusaku, the other family members have gained the same social positions and financial status as they had. Hirofumi, who is the first son of the Kitazawa family, comes back from Los Angeles. As a doctor, he learned new techniques using A.I. in Los Angeles. Hirofumi states that artificial intelligence will become a big part of human life in the future. He brings A.I. Kenji and A.I. Sayuri to the Kitazawa family.