Episode 1
S1E1
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Ichiko and Otoya are happily married, despite not having sex for the last two years. The secret to their happiness is Otoya's affair with Mitsuki, which Ichiko approves. Everything is going well until Otoya rejects Ichiko's advances on the night of their seventh anniversary. In shock, Ichiko seeks advice from her friend who suggests she exercise her right to have a boyfriend of her own.