Mr. Tsukishima, who has been married for eight years, has two children and seems to have built a peaceful family, but there is no love between the couple; they are living for the sake of their children. However, recently she wanted to confirm her value as a woman separate from the role of 'mother,' and couldn't suppress the desire for recognition by being intensely pursued by someone. She also couldn't resist the curiosity for unknown stimuli, ultimately deciding to release her sexual impulses and cross the line.
