An infamous yakuza sets out to master the Way of the Househusband! "The Immortal Dragon"—an infamous and feared yakuza who has left behind countless legends in the underworld—has decided to wash his hands of his dark past and become… a "househusband"! Under the watchful eye of the neighborhood, the yakuza, and the police, witness this gangster-turned-husband's style of "justice and family love." A thrilling slapstick drama where the ultimate househusband faces struggles from every side! Can Tatsu protect his beloved family and neighborhood when they are caught up in an incident?

Yukiko Akaza attends a high school for blind. She has amblyopia, which causes her to recognize colors only vaguely and she can recognize large letters with a magnifying glass. When she walks outdoors, she always carries a white cane. Nevertheless, she has a bright personality. One day, Yukiko happens to meet delinquent boy Morio Kurokawa. At first, Yukiko doesn't like him, but she somehow gains an understanding of him. They become attracted to each other.

Hayami Honoka works in the sales department for a major consumer electronics company. She is excellent at her job and is respected by her colleagues. She seems like a clean freak at work and her colleagues think she is a perfect person to marry. But, in her private life, her home is a complete mess. Things there are unorganized and dirty. On the flip side, when she arrives at work, she looks perfect. Meanwhile, Yamamoto Chihiro is Hayami Honoka's co-worker in the same department. He joined the company 3 years after Hayami Honoka. When he was a child, Yamamoto Chihiro and his two brothers did the housework at his home, while his mother was busy with her job. Because of this, Yamamoto Chihiro is excellent at doing household chores. Due to a case, he happens to learn that Hayami Honoka's home is a mess. He begins to stay with Hayami Honoka on the condition of doing the house work.