Yumiko and her son Masahiro had a strong bond, but because it was too strong, the bond between the two escalated in an unexpected direction. I want to comfort her mother who is lonely because her marital life has stagnated. Her son approached her with all her heart, and she accepted that her mother wanted to reciprocate her son's kindness. However, with just one mistake, Yumiko's body becomes captivated by her son. And her son was illegitimate. I can't stop anymore. The two of them keep their bodies in close contact to the limit and drown in the forbidden world.
