A few years ago, Nozomi divorced her husband due to his infidelity, and since then she has poured all her love into raising her only son, Souta. But recently, as Souta enters adolescence, he begins acting distant and shows less interest in her. Desperate to hold on to her son who is gradually becoming independent, Nozomi clings to him emotionally, eventually leading them into a taboo, forbidden relationship. As the bond between mother and son begins to unravel, the story captures the intense emotional turmoil that engulfs them both.