Waltz

A high school dropout with no name works as a hired killer, carrying out assassinations with a knife in a detached and emotionless manner. He eliminates anyone obstructing his path, including strangers or the person who hired him. After a botched job, he encounters a man named Iwanishi, who dubs him "Semi" due to his tendency to talk excessively. Iwanishi offers to manage Semi's contract work, handling the logistical side of his profession. However, it appears Iwanishi may be hiding a hidden motive that Semi is unaware of.