Chiyuki is a widow raising her late husband's son, Kenji, on her own. As Kenji gradually matures into a man, Chiyuki begins to feel him more and more as a male presence. Meanwhile, Kenji secretly harbors feelings for Chiyuki, constantly fantasizing about her. One day, Kenji confesses his emotions, revealing his desire to her. Though conflicted at first, their feelings slowly intertwine and deepen. An erotic relationship unfolds between them, overflowing with the sensual charm of a mature, voluptuous milf.