Sakamoto Days Part 2

Sakamoto retires from his hitman career after meeting Aoi, a convenience store clerk, and getting married to him. He and Aoi have a daughter and later open a small family-owned convenience store in a quiet town. However, Sakamoto's life of domesticity is disrupted when he undergoes significant physical changes, gaining weight. He then joins forces with his former comrades to protect his family from a group of assassins.