Love, betrayal, and desperation amid the irrational world of adulthood… 35-year-old Sayaka has lived with her husband Kazuma for a decade. She wants a child, but Kazuma has refused -- in no small part because he's cheating on her with her friend Rui! Sayaka's suspicions lead to a huge argument, but even though they make up the next day, a chance encounter with her old flame Keiichi Akiyama during work makes Sayaka's heart skip a beat. Can she resist the temptation...?