The Mito household consists of just mother and son, as the husband is living apart for work. Mother Kana was worried about her reclusive son, but recently felt relieved seeing him make a friend—Shohei. However, Shohei, raised in a single-parent home and starved for maternal affection, gradually becomes infatuated with Kana's kindness, his feelings twisting into obsession. Exploiting her warmth and gentleness, he forcefully takes her. As his thick cock plunges deep into her most intimate depths, awakening long-dormant desires, Kana resists mentally, yet her body slowly succumbs to Shohei's advances.