Returning from shopping, Maki, an exhausted mother worn down by daily routine, sits on a bench, holding her inner turmoil close. Within this ordinary scene lies the deeply twisted relationship between mother and son. After marriage, tormented by her husband's insatiable sexual demands, Maki begins relying on her son, Tatsuya, for emotional support. But Tatsuya's actions go beyond mere comfort—they become a source of torment. His words, "Come on, suck my dick too," warp both her maternal tenderness and his filial affection. Drawn into this distorted love, Maki's mind gradually unravels. The Tomoda family's everyday life is bound together by threads of secrecy and desire, inevitably leading them into ruin.