Warehouse was a really messed up one and I really liked it but it's not warehouse ;w; thank you for trying though!
http://www.mangago.me/read-manga/obey_me/
This maybe?
Hehe, not that one either. That one was also a great manga!
Ehhh.. an easy target? MC worked at a convience store, got kidnapped and such.
http://www.mangago.me/read-manga/hogu_hagyeongsu/?1fNQ
It isn't that either. I believe i went over the part where the dude got "kidnapped" he basically was tied to a chair and told that he had to follow his rules or something? I forgot. But he was also able to do his job. He just had to meet the other dude at places and do 'things'.
but thank you for trying!
OKAY SO- BASICALLY I THINK THIS MANGA IS ABOUT THIS DUDE AND HE WORKS AT SOME PLACE AND THERE IS SOME DUDE THAT ALSO WORKS THERE AND BASICALLY HE KIDNAPS HIM AND THE DUDE REMEMBERS THAT HE USED TO DO STUFF TO THE PERSON THAT KIDNAPPED HIM AND NOW THAT PERSON IS LIKE KINDA TAKING REVENGE, AAAA IK THAT MAYBE HARD TO UNDERSTAND BUT PEASE HELP