**Synopsis -** The "love, revenge, and feel-good" story centers on a young man who swears revenge against the yakuza. He studies the art of the "assassination fist" with all his might, and becomes an adult. But this man who is a genius at his martial art form realizes his techniques cannot actually be used to kill anyone.  Scanlations by: [Sources](https://www.mangaupdates.com/releases.html?search=42846876325&stype=series)