Until the Strongest Wife Heroine is Cuckolded

Synopsis

Mayumi Kouki appears to be living a normal life as a housewife, but that’s merely a cover. Her true identity is Mistress Blue, one of the Mistress Ladies—warriors gifted with transformation brooches to fight evil organizations threatening humanity and protect world peace and order.

One day, her husband’s boss Goro Sumitani accidentally witnesses her transforming back to her normal self. Sumitani, who has long harbored secret desires for Mayumi, seizes this opportunity. He steals her transformation item and demands she submit to being cuckolded in exchange for its return…