While the client usually wants someone eliminated "free-of-charge," Usobuki’s true payment is witnessing the "folly of humankind".

The manga centers on , a mysterious man in a black suit with piercing crimson eyes. He is an assassin who never technically "kills" his targets. Instead, he uses the "power of suggestion" to manipulate his victims' thoughts, leading them to their own deaths through suicide or carefully orchestrated accidents. Because there is no physical evidence or direct action, his crimes are considered "impossible to prosecute" . Chapter 41: "The Bond Between Husband and Wife (Part 2)"

Unlike typical battle manga, the tension comes from watching how easily a human mind can be unraveled by a few words.

This chapter concludes a heavy story arc that examines the psychological fragility of domestic relationships.

Like most chapters, it begins with a client desperate enough to seek out Usobuki at his rumored telephone booth.

You can find the full chapter and the rest of the series through readers like MangaDex or Anime-Planet. 1 | Chapter 41 - Funouhan - MangaDex