After a long time away from home in hiding, the young couple finally returned to their nest. However, as soon as they stepped inside, they were scolded fiercely by the old father for everything that had happened. Feeling aggrieved, they decided to leave home once again. At that moment, the husband met his childhood friend Ashina, but during his tough time, she not only couldn’t help him but also seized the opportunity to seduce him. Naturally, feeling unstable, in a moment of desperation, he did something wrong to his faithful wife. This is the content of the beginning of the film, which, although it has 4 parts, mainly tells the story of the illicit love affair between the close friends and a married guy.