One day in 20XX, the alien pig prince who planned to take a human body as his home arrived on Earth, but unexpectedly discovered that the human being he wanted to live in had not yet been born! The pig prince, who has nowhere to settle down, got to know Saiji and Rubi. The three pulled various funny pranks on humans, causing humans to have baldness, bad breath, headaches, emotional crisis and other problems.

The fun and mysterious daily life of a young couple in a forest and strange children who come to them one day.

The name Tarou Sakamoto once instilled fear in every villain. No other professional hitman matched his prowess, and fellow assassins revered him. However, Sakamoto fell in love. In five short years, he married, became a father, put on some weight, and traded his weapons for an apron as he became the owner of a humble convenience store. Although Sakamoto is decidedly retired, he finds his old life of crime hard to shake off. His former partner, Shin Asakura, reappears and resolves to stay with Sakamoto's family under their strict no-kill rule. To make matters worse, a large bounty is placed on Sakamoto's head. Numerous assassins now pursue him—but they are in for a surprise. Sakamoto has not lost his edge, and no matter what tricks his enemies pull, he will fight off every last one to protect his dear family.