A secret that must not be known by anyone always starts quietly. It was supposed to be a trivial incident, but once the sense of incongruity is born, it gradually erodes daily life. A mother who pretends not to see, an accountant son who pretends not to notice; as their individual intentions intersect, the parent-child relationship slowly changes shape. Things to protect and emotions that can't be let go. The sexual desire of a mother and son swaying between the two. In the end, is it regret or something else―.
