Episode 1 - S1.E1

In a hotel for their anniversary, Ichiko makes an advance on her husband. However, she is shocked when Otoya rejects her because of his mistress, Mitsuki. Although Ichiko permitted his affair, Otoya's rejection leaves her confused and hurt. Seeking advice from her friend, Ichiko is reminded that she is also allowed to have an affair. So she turns to an old college friend to fulfill her desires.