Sojiro Chiba

When an all-powerful enemy appears to destroy all parallel worlds, a hero with the spirit of all Super Sentai will rise to fight back. Transforming into Zenkaiser, he joins forces with four robots called Kikainoids with the spirit of Super Sentai robos from across history.

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.