Following.
Warehouse
Killing Stalking
An uncomfortable truth
And I recommend "The Moon is Beautiful Tonight, but First, Die" (they really need to clean up the title). The MC is more of an unwilling psycopath than anything else, and the romance is minimal.
Oh no already read all of those
Ito-san is about a prostitute and a hitman who lacks emotions.
http://www.mangago.zone/read-manga/itou_san_kuraka_sui/
some people need to read the whole post.
was not implying you
Oh. Well then ... how about http://www.mangago.zone/read-manga/homunculus/ ?
The male main character is a psychopath or sociopath? I prefer if there’s no romance in it...
Already read:
1. Killing stalking
2. Bastard
3. Infectee
4. Deadman wonderland
5. Ousama game - kigen
6. Wolf & mary
7. Mayonaka no X Giten
8. Warehouse
9. Ana Satsujin
10. Deadtube
11. Prison lab
12. Real account
13. Similar terms
14. Kakegurui
15. moon is beautiful tonight, but first, die