The secret love affair of Nao Kiritani and her ex-lover began one day when she went out for a beer with her high school friend, but little did she know that her ex-boyfriend had bribed her friend with a sum of money, so she got drunk and handed her over to him. Everything was part of the plan; afterward, he took Kiritani to a hotel and then... Speaking about Kiritani's family, they lived together quite happily, but their sexual life was not as expected, as her husband suffered from impotence and could not satisfy her like her previous boyfriend had...