After a long time of not seeing each other, a group of four close friends went to the hot springs. And this trip had the purpose of adultery, a married couple secretly had sex with each other and this was the best opportunity for them to be together a lot. Concealing the eyes of those around them, after getting drunk, they found each other in the bathroom and had sex all night long. After a while, this girlfriend got pregnant and it was very likely that her husband was taking the blame.