Hisahide Matsukata, ex-leader of the Yakuza's Onikaku clan, resigned his position to live alone for the rest of his life... Until a stray cat showed up at his house! His daily life, which was completely peaceful, turned completely upside down and he was completely at the mercy of the cat's unpredictable behavior! Now, every day is as noisy as it was when he was in the yakuza!!!