Read manga: Tenshi Shukushi

manga
Genres: Drama ; Psychological ; Shoujo
Artists: Kusanagi Toshiki
Status: ongoing
Latest chapter: Vol.1 Chapter 5
Updated at: Aug 25, 2019
Summary:

Yui, codename: "The Killing Doll" is an matchless assassin, programmed with an emotional override that makes him little more than a puppet. Hired out by a ruthless coorporation, Yui loses control of himself whenever there's a job to be done. In the precious few moments he has to himself, he tries to build a life for himself with the guidance of a priest and fellow assassin, Miyagi.