UPDATED : Some missing frames has been added.
Kasumi has been feeling uneasy lately because she and her husband haven’t been intimate. To make things worse, she noticed her daughter and husband getting closer, which made her uncomfortable.
One night, Kasumi woke up to a strange noise and saw her daughter and husband fooling around. This hurt her deeply.
The next day, she met an unpleasant middle-aged man who showed her a picture that made everything even worse. The picture showed her husband and daughter being intimate, something that Kasumi and her husband should be doing together. This left her feeling extremely upset.
And then the man then invited Kasumi to his apartment, to “help” her venting her frustation.