Our heroine has been a full-time housewife for two years. She gets along well with the neighbors and leads a happy, albeit ordinary, life. Her only real source of worry is that she's been having trouble getting pregnant and the fact her husband always works late. Ryoma, the son of the family next-door, is quite the looker. He may not be very friendly, or the type to wear his heart on his sleeve, but she sees him often and has been able to strike up a conversation with him. All the things in her life seemed to be in order, until one day she's asked by her neighbors to keep an eye out for Ryoma while they're gone. When her husband can't make it home that night, what should have been a simple task soon leads her entangled in a dangerous, yet passionate, web with her neighbor...