Aki Sasaki lives with her son Ayumu as a single mother. Aki, who has been treating Ayumu with the thought that she must act as a father figure, ends up doting on her son excessively. Because of this, Ayumu has grown up to be a bit of a mama's boy, and before he knows it, he begins to have special feelings for Aki that are not those of a parent and child... The forbidden relationship between mother and child... the sense of immorality that fuels the two of them even more...!!