Synopsis

Taro Sakamoto was known as the best assassin, causing both villains and other hitmen to fear him. But then something unexpected happened – he fell in love! He retired, got married, and had a family. Life seemed peaceful, but guess what? Taro gained weight. Turns out, the friendly, chubby store owner in your neighborhood used to be a famous hitman! Will he be able to keep his family safe from danger? Gear up for a brand-new action comedy series!

(Source: Manga Plus)