Kawana Minori is happily married but the family is suffering great Economic distress from money debts, this makes any plan of having a baby unthinkable and postponed.
With that going on, 2 things happen = 1. A strange stalker with a pregnancy fetish appears on Minori’s life, 2. She begins to ovulate.
The stalker dude is quite persistent and decides to stay around, until him impregnating mission is fulfilled.