Rei, who had lived harmoniously with her husband, moved to her dream tower apartment. Excited about her new life in a luxurious condo resembling a grand hotel, she discovered there were special 'rules' created by the long-standing resident moms. Rei accidentally reunited with Kisaki, her old classmate, and they grew close. However, due to these rules, their relationship began to crumble. Who will end up laughing in the end...?