Introduction Arc

Taro Sakamoto's peaceful life running a convenience store is disrupted when his past as a legendary hitman is revealed, forcing him to protect his family.

The Introduction Arc establishes Taro Sakamoto as a seemingly ordinary middle-aged convenience store owner who is overweight and out of shape, living a quiet life with his loving wife Aiko and son Shiro. When various assassins and criminals discover his true identity as the legendary 'Sakamoto,' the world's most dangerous hitman, his peaceful existence crumbles. Despite his physical decline, Sakamoto's combat instincts remain sharp as he uses unconventional household items from his store to neutralize threats. This arc sets up the core premise of the series: a retired assassin must balance his desire for normalcy with the constant danger seeking him out.